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def get_dict(self, timeout=-1):
"""Get the results as a dict, keyed by engine_id.
timeout behavior is described in `get()`.
"""
results = self.get(timeout)
engine_ids = [ md['engine_id'] for md in self._metadata ]
bycount = sorted(engine_ids, key=lambda k: engine_ids.count(k))
maxcount = bycount.count(bycount[-1])
if maxcount > 1:
raise ValueError("Cannot build dict, %i jobs ran on engine #%i"%(
maxcount, bycount[-1]))
return dict(zip(engine_ids,results)) |
def abort(self):
"""abort my tasks."""
assert not self.ready(), "Can't abort, I am already done!"
return self._client.abort(self.msg_ids, targets=self._targets, block=True) |
def timedelta(self, start, end, start_key=min, end_key=max):
"""compute the difference between two sets of timestamps
The default behavior is to use the earliest of the first
and the latest of the second list, but this can be changed
by passing a different
Parameters
----------
start : one or more datetime objects (e.g. ar.submitted)
end : one or more datetime objects (e.g. ar.received)
start_key : callable
Function to call on `start` to extract the relevant
entry [defalt: min]
end_key : callable
Function to call on `end` to extract the relevant
entry [default: max]
Returns
-------
dt : float
The time elapsed (in seconds) between the two selected timestamps.
"""
if not isinstance(start, datetime):
# handle single_result AsyncResults, where ar.stamp is single object,
# not a list
start = start_key(start)
if not isinstance(end, datetime):
# handle single_result AsyncResults, where ar.stamp is single object,
# not a list
end = end_key(end)
return _total_seconds(end - start) |
def progress(self):
"""the number of tasks which have been completed at this point.
Fractional progress would be given by 1.0 * ar.progress / len(ar)
"""
self.wait(0)
return len(self) - len(set(self.msg_ids).intersection(self._client.outstanding)) |
def elapsed(self):
"""elapsed time since initial submission"""
if self.ready():
return self.wall_time
now = submitted = datetime.now()
for msg_id in self.msg_ids:
if msg_id in self._client.metadata:
stamp = self._client.metadata[msg_id]['submitted']
if stamp and stamp < submitted:
submitted = stamp
return _total_seconds(now-submitted) |
def serial_time(self):
"""serial computation time of a parallel calculation
Computed as the sum of (completed-started) of each task
"""
t = 0
for md in self._metadata:
t += _total_seconds(md['completed'] - md['started'])
return t |
def wait_interactive(self, interval=1., timeout=None):
"""interactive wait, printing progress at regular intervals"""
N = len(self)
tic = time.time()
while not self.ready() and (timeout is None or time.time() - tic <= timeout):
self.wait(interval)
clear_output()
print("%4i/%i tasks finished after %4i s" % (self.progress, N, self.elapsed), end="")
sys.stdout.flush()
print()
print("done") |
def _republish_displaypub(self, content, eid):
"""republish individual displaypub content dicts"""
try:
ip = get_ipython()
except NameError:
# displaypub is meaningless outside IPython
return
md = content['metadata'] or {}
md['engine'] = eid
ip.display_pub.publish(content['source'], content['data'], md) |
def _wait_for_outputs(self, timeout=-1):
"""wait for the 'status=idle' message that indicates we have all outputs
"""
if not self._success:
# don't wait on errors
return
tic = time.time()
while not all(md['outputs_ready'] for md in self._metadata):
time.sleep(0.01)
self._client._flush_iopub(self._client._iopub_socket)
if timeout >= 0 and time.time() > tic + timeout:
break |
def display_outputs(self, groupby="type"):
"""republish the outputs of the computation
Parameters
----------
groupby : str [default: type]
if 'type':
Group outputs by type (show all stdout, then all stderr, etc.):
[stdout:1] foo
[stdout:2] foo
[stderr:1] bar
[stderr:2] bar
if 'engine':
Display outputs for each engine before moving on to the next:
[stdout:1] foo
[stderr:1] bar
[stdout:2] foo
[stderr:2] bar
if 'order':
Like 'type', but further collate individual displaypub
outputs. This is meant for cases of each command producing
several plots, and you would like to see all of the first
plots together, then all of the second plots, and so on.
"""
if self._single_result:
self._display_single_result()
return
stdouts = self.stdout
stderrs = self.stderr
pyouts = self.pyout
output_lists = self.outputs
results = self.get()
targets = self.engine_id
if groupby == "engine":
for eid,stdout,stderr,outputs,r,pyout in zip(
targets, stdouts, stderrs, output_lists, results, pyouts
):
self._display_stream(stdout, '[stdout:%i] ' % eid)
self._display_stream(stderr, '[stderr:%i] ' % eid, file=sys.stderr)
try:
get_ipython()
except NameError:
# displaypub is meaningless outside IPython
return
if outputs or pyout is not None:
_raw_text('[output:%i]' % eid)
for output in outputs:
self._republish_displaypub(output, eid)
if pyout is not None:
display(r)
elif groupby in ('type', 'order'):
# republish stdout:
for eid,stdout in zip(targets, stdouts):
self._display_stream(stdout, '[stdout:%i] ' % eid)
# republish stderr:
for eid,stderr in zip(targets, stderrs):
self._display_stream(stderr, '[stderr:%i] ' % eid, file=sys.stderr)
try:
get_ipython()
except NameError:
# displaypub is meaningless outside IPython
return
if groupby == 'order':
output_dict = dict((eid, outputs) for eid,outputs in zip(targets, output_lists))
N = max(len(outputs) for outputs in output_lists)
for i in range(N):
for eid in targets:
outputs = output_dict[eid]
if len(outputs) >= N:
_raw_text('[output:%i]' % eid)
self._republish_displaypub(outputs[i], eid)
else:
# republish displaypub output
for eid,outputs in zip(targets, output_lists):
if outputs:
_raw_text('[output:%i]' % eid)
for output in outputs:
self._republish_displaypub(output, eid)
# finally, add pyout:
for eid,r,pyout in zip(targets, results, pyouts):
if pyout is not None:
display(r)
else:
raise ValueError("groupby must be one of 'type', 'engine', 'collate', not %r" % groupby) |
def _unordered_iter(self):
"""iterator for results *as they arrive*, on FCFS basis, ignoring submission order."""
try:
rlist = self.get(0)
except error.TimeoutError:
pending = set(self.msg_ids)
while pending:
try:
self._client.wait(pending, 1e-3)
except error.TimeoutError:
# ignore timeout error, because that only means
# *some* jobs are outstanding
pass
# update ready set with those no longer outstanding:
ready = pending.difference(self._client.outstanding)
# update pending to exclude those that are finished
pending = pending.difference(ready)
while ready:
msg_id = ready.pop()
ar = AsyncResult(self._client, msg_id, self._fname)
rlist = ar.get()
try:
for r in rlist:
yield r
except TypeError:
# flattened, not a list
# this could get broken by flattened data that returns iterables
# but most calls to map do not expose the `flatten` argument
yield rlist
else:
# already done
for r in rlist:
yield r |
def wait(self, timeout=-1):
"""wait for result to complete."""
start = time.time()
if self._ready:
return
local_ids = filter(lambda msg_id: msg_id in self._client.outstanding, self.msg_ids)
local_ready = self._client.wait(local_ids, timeout)
if local_ready:
remote_ids = filter(lambda msg_id: msg_id not in self._client.results, self.msg_ids)
if not remote_ids:
self._ready = True
else:
rdict = self._client.result_status(remote_ids, status_only=False)
pending = rdict['pending']
while pending and (timeout < 0 or time.time() < start+timeout):
rdict = self._client.result_status(remote_ids, status_only=False)
pending = rdict['pending']
if pending:
time.sleep(0.1)
if not pending:
self._ready = True
if self._ready:
try:
results = map(self._client.results.get, self.msg_ids)
self._result = results
if self._single_result:
r = results[0]
if isinstance(r, Exception):
raise r
else:
results = error.collect_exceptions(results, self._fname)
self._result = self._reconstruct_result(results)
except Exception, e:
self._exception = e
self._success = False
else:
self._success = True
finally:
self._metadata = map(self._client.metadata.get, self.msg_ids) |
def abs_file(filename):
"""Return the absolute normalized form of `filename`."""
path = os.path.expandvars(os.path.expanduser(filename))
path = os.path.abspath(os.path.realpath(path))
path = actual_path(path)
return path |
def prep_patterns(patterns):
"""Prepare the file patterns for use in a `FnmatchMatcher`.
If a pattern starts with a wildcard, it is used as a pattern
as-is. If it does not start with a wildcard, then it is made
absolute with the current directory.
If `patterns` is None, an empty list is returned.
"""
prepped = []
for p in patterns or []:
if p.startswith("*") or p.startswith("?"):
prepped.append(p)
else:
prepped.append(abs_file(p))
return prepped |
def sep(s):
"""Find the path separator used in this string, or os.sep if none."""
sep_match = re.search(r"[\\/]", s)
if sep_match:
the_sep = sep_match.group(0)
else:
the_sep = os.sep
return the_sep |
def find_python_files(dirname):
"""Yield all of the importable Python files in `dirname`, recursively.
To be importable, the files have to be in a directory with a __init__.py,
except for `dirname` itself, which isn't required to have one. The
assumption is that `dirname` was specified directly, so the user knows
best, but subdirectories are checked for a __init__.py to be sure we only
find the importable files.
"""
for i, (dirpath, dirnames, filenames) in enumerate(os.walk(dirname)):
if i > 0 and '__init__.py' not in filenames:
# If a directory doesn't have __init__.py, then it isn't
# importable and neither are its files
del dirnames[:]
continue
for filename in filenames:
# We're only interested in files that look like reasonable Python
# files: Must end with .py or .pyw, and must not have certain funny
# characters that probably mean they are editor junk.
if re.match(r"^[^.#~!$@%^&*()+=,]+\.pyw?$", filename):
yield os.path.join(dirpath, filename) |
def relative_filename(self, filename):
"""Return the relative form of `filename`.
The filename will be relative to the current directory when the
`FileLocator` was constructed.
"""
fnorm = os.path.normcase(filename)
if fnorm.startswith(self.relative_dir):
filename = filename[len(self.relative_dir):]
return filename |
def canonical_filename(self, filename):
"""Return a canonical filename for `filename`.
An absolute path with no redundant components and normalized case.
"""
if filename not in self.canonical_filename_cache:
if not os.path.isabs(filename):
for path in [os.curdir] + sys.path:
if path is None:
continue
f = os.path.join(path, filename)
if os.path.exists(f):
filename = f
break
cf = abs_file(filename)
self.canonical_filename_cache[filename] = cf
return self.canonical_filename_cache[filename] |
def get_zip_data(self, filename):
"""Get data from `filename` if it is a zip file path.
Returns the string data read from the zip file, or None if no zip file
could be found or `filename` isn't in it. The data returned will be
an empty string if the file is empty.
"""
import zipimport
markers = ['.zip'+os.sep, '.egg'+os.sep]
for marker in markers:
if marker in filename:
parts = filename.split(marker)
try:
zi = zipimport.zipimporter(parts[0]+marker[:-1])
except zipimport.ZipImportError:
continue
try:
data = zi.get_data(parts[1])
except IOError:
continue
return to_string(data)
return None |
def match(self, fpath):
"""Does `fpath` indicate a file in one of our trees?"""
for d in self.dirs:
if fpath.startswith(d):
if fpath == d:
# This is the same file!
return True
if fpath[len(d)] == os.sep:
# This is a file in the directory
return True
return False |
def match(self, fpath):
"""Does `fpath` match one of our filename patterns?"""
for pat in self.pats:
if fnmatch.fnmatch(fpath, pat):
return True
return False |
def add(self, pattern, result):
"""Add the `pattern`/`result` pair to the list of aliases.
`pattern` is an `fnmatch`-style pattern. `result` is a simple
string. When mapping paths, if a path starts with a match against
`pattern`, then that match is replaced with `result`. This models
isomorphic source trees being rooted at different places on two
different machines.
`pattern` can't end with a wildcard component, since that would
match an entire tree, and not just its root.
"""
# The pattern can't end with a wildcard component.
pattern = pattern.rstrip(r"\/")
if pattern.endswith("*"):
raise CoverageException("Pattern must not end with wildcards.")
pattern_sep = sep(pattern)
# The pattern is meant to match a filepath. Let's make it absolute
# unless it already is, or is meant to match any prefix.
if not pattern.startswith('*') and not isabs_anywhere(pattern):
pattern = abs_file(pattern)
pattern += pattern_sep
# Make a regex from the pattern. fnmatch always adds a \Z or $ to
# match the whole string, which we don't want.
regex_pat = fnmatch.translate(pattern).replace(r'\Z(', '(')
if regex_pat.endswith("$"):
regex_pat = regex_pat[:-1]
# We want */a/b.py to match on Windows too, so change slash to match
# either separator.
regex_pat = regex_pat.replace(r"\/", r"[\\/]")
# We want case-insensitive matching, so add that flag.
regex = re.compile(r"(?i)" + regex_pat)
# Normalize the result: it must end with a path separator.
result_sep = sep(result)
result = result.rstrip(r"\/") + result_sep
self.aliases.append((regex, result, pattern_sep, result_sep)) |
def map(self, path):
"""Map `path` through the aliases.
`path` is checked against all of the patterns. The first pattern to
match is used to replace the root of the path with the result root.
Only one pattern is ever used. If no patterns match, `path` is
returned unchanged.
The separator style in the result is made to match that of the result
in the alias.
"""
for regex, result, pattern_sep, result_sep in self.aliases:
m = regex.match(path)
if m:
new = path.replace(m.group(0), result)
if pattern_sep != result_sep:
new = new.replace(pattern_sep, result_sep)
if self.locator:
new = self.locator.canonical_filename(new)
return new
return path |
def loop_qt4(kernel):
"""Start a kernel with PyQt4 event loop integration."""
from IPython.external.qt_for_kernel import QtCore
from IPython.lib.guisupport import get_app_qt4, start_event_loop_qt4
kernel.app = get_app_qt4([" "])
kernel.app.setQuitOnLastWindowClosed(False)
kernel.timer = QtCore.QTimer()
kernel.timer.timeout.connect(kernel.do_one_iteration)
# Units for the timer are in milliseconds
kernel.timer.start(1000*kernel._poll_interval)
start_event_loop_qt4(kernel.app) |
def loop_wx(kernel):
"""Start a kernel with wx event loop support."""
import wx
from IPython.lib.guisupport import start_event_loop_wx
doi = kernel.do_one_iteration
# Wx uses milliseconds
poll_interval = int(1000*kernel._poll_interval)
# We have to put the wx.Timer in a wx.Frame for it to fire properly.
# We make the Frame hidden when we create it in the main app below.
class TimerFrame(wx.Frame):
def __init__(self, func):
wx.Frame.__init__(self, None, -1)
self.timer = wx.Timer(self)
# Units for the timer are in milliseconds
self.timer.Start(poll_interval)
self.Bind(wx.EVT_TIMER, self.on_timer)
self.func = func
def on_timer(self, event):
self.func()
# We need a custom wx.App to create our Frame subclass that has the
# wx.Timer to drive the ZMQ event loop.
class IPWxApp(wx.App):
def OnInit(self):
self.frame = TimerFrame(doi)
self.frame.Show(False)
return True
# The redirect=False here makes sure that wx doesn't replace
# sys.stdout/stderr with its own classes.
kernel.app = IPWxApp(redirect=False)
# The import of wx on Linux sets the handler for signal.SIGINT
# to 0. This is a bug in wx or gtk. We fix by just setting it
# back to the Python default.
import signal
if not callable(signal.getsignal(signal.SIGINT)):
signal.signal(signal.SIGINT, signal.default_int_handler)
start_event_loop_wx(kernel.app) |
def loop_tk(kernel):
"""Start a kernel with the Tk event loop."""
import Tkinter
doi = kernel.do_one_iteration
# Tk uses milliseconds
poll_interval = int(1000*kernel._poll_interval)
# For Tkinter, we create a Tk object and call its withdraw method.
class Timer(object):
def __init__(self, func):
self.app = Tkinter.Tk()
self.app.withdraw()
self.func = func
def on_timer(self):
self.func()
self.app.after(poll_interval, self.on_timer)
def start(self):
self.on_timer() # Call it once to get things going.
self.app.mainloop()
kernel.timer = Timer(doi)
kernel.timer.start() |
def loop_gtk(kernel):
"""Start the kernel, coordinating with the GTK event loop"""
from .gui.gtkembed import GTKEmbed
gtk_kernel = GTKEmbed(kernel)
gtk_kernel.start() |
def loop_cocoa(kernel):
"""Start the kernel, coordinating with the Cocoa CFRunLoop event loop
via the matplotlib MacOSX backend.
"""
import matplotlib
if matplotlib.__version__ < '1.1.0':
kernel.log.warn(
"MacOSX backend in matplotlib %s doesn't have a Timer, "
"falling back on Tk for CFRunLoop integration. Note that "
"even this won't work if Tk is linked against X11 instead of "
"Cocoa (e.g. EPD). To use the MacOSX backend in the kernel, "
"you must use matplotlib >= 1.1.0, or a native libtk."
)
return loop_tk(kernel)
from matplotlib.backends.backend_macosx import TimerMac, show
# scale interval for sec->ms
poll_interval = int(1000*kernel._poll_interval)
real_excepthook = sys.excepthook
def handle_int(etype, value, tb):
"""don't let KeyboardInterrupts look like crashes"""
if etype is KeyboardInterrupt:
io.raw_print("KeyboardInterrupt caught in CFRunLoop")
else:
real_excepthook(etype, value, tb)
# add doi() as a Timer to the CFRunLoop
def doi():
# restore excepthook during IPython code
sys.excepthook = real_excepthook
kernel.do_one_iteration()
# and back:
sys.excepthook = handle_int
t = TimerMac(poll_interval)
t.add_callback(doi)
t.start()
# but still need a Poller for when there are no active windows,
# during which time mainloop() returns immediately
poller = zmq.Poller()
if kernel.control_stream:
poller.register(kernel.control_stream.socket, zmq.POLLIN)
for stream in kernel.shell_streams:
poller.register(stream.socket, zmq.POLLIN)
while True:
try:
# double nested try/except, to properly catch KeyboardInterrupt
# due to pyzmq Issue #130
try:
# don't let interrupts during mainloop invoke crash_handler:
sys.excepthook = handle_int
show.mainloop()
sys.excepthook = real_excepthook
# use poller if mainloop returned (no windows)
# scale by extra factor of 10, since it's a real poll
poller.poll(10*poll_interval)
kernel.do_one_iteration()
except:
raise
except KeyboardInterrupt:
# Ctrl-C shouldn't crash the kernel
io.raw_print("KeyboardInterrupt caught in kernel")
finally:
# ensure excepthook is restored
sys.excepthook = real_excepthook |
def enable_gui(gui, kernel=None):
"""Enable integration with a given GUI"""
if gui not in loop_map:
raise ValueError("GUI %r not supported" % gui)
if kernel is None:
if Application.initialized():
kernel = getattr(Application.instance(), 'kernel', None)
if kernel is None:
raise RuntimeError("You didn't specify a kernel,"
" and no IPython Application with a kernel appears to be running."
)
loop = loop_map[gui]
if kernel.eventloop is not None and kernel.eventloop is not loop:
raise RuntimeError("Cannot activate multiple GUI eventloops")
kernel.eventloop = loop |
def GOE(N):
"""Creates an NxN element of the Gaussian Orthogonal Ensemble"""
m = ra.standard_normal((N,N))
m += m.T
return m/2 |
def center_eigenvalue_diff(mat):
"""Compute the eigvals of mat and then find the center eigval difference."""
N = len(mat)
evals = np.sort(la.eigvals(mat))
diff = np.abs(evals[N/2] - evals[N/2-1])
return diff |
def ensemble_diffs(num, N):
"""Return num eigenvalue diffs for the NxN GOE ensemble."""
diffs = np.empty(num)
for i in xrange(num):
mat = GOE(N)
diffs[i] = center_eigenvalue_diff(mat)
return diffs |
def init(self, ctxt, step_addr):
"""
Initialize the item. This calls the class constructor with the
appropriate arguments and returns the initialized object.
:param ctxt: The context object.
:param step_addr: The address of the step in the test
configuration.
"""
return self.cls(ctxt, self.name, self.conf, step_addr) |
def parse_file(cls, ctxt, fname, key=None, step_addr=None):
"""
Parse a YAML file containing test steps.
:param ctxt: The context object.
:param fname: The name of the file to parse.
:param key: An optional dictionary key. If specified, the
file must be a YAML dictionary, and the referenced
value will be interpreted as a list of steps. If
not provided, the file must be a YAML list, which
will be interpreted as the list of steps.
:param step_addr: The address of the step in the test
configuration. This may be used in the case
of includes, for instance.
:returns: A list of ``Step`` objects.
"""
# Load the YAML file
try:
with open(fname) as f:
step_data = yaml.load(f)
except Exception as exc:
raise ConfigError(
'Failed to read file "%s": %s' % (fname, exc),
step_addr,
)
# Do we have a key?
if key is not None:
if (not isinstance(step_data, collections.Mapping) or
key not in step_data):
raise ConfigError(
'Bad step configuration file "%s": expecting dictionary '
'with key "%s"' % (fname, key),
step_addr,
)
# Extract just the step data
step_data = step_data[key]
# Validate that it's a sequence
if not isinstance(step_data, collections.Sequence):
addr = ('%s[%s]' % (fname, key)) if key is not None else fname
raise ConfigError(
'Bad step configuration sequence at %s: expecting list, '
'not "%s"' % (addr, step_data.__class__.__name__),
step_addr,
)
# OK, assemble the step list and return it
steps = []
for idx, step_conf in enumerate(step_data):
steps.extend(cls.parse_step(
ctxt, StepAddress(fname, idx, key), step_conf))
return steps |
def parse_step(cls, ctxt, step_addr, step_conf):
"""
Parse a step dictionary.
:param ctxt: The context object.
:param step_addr: The address of the step in the test
configuration.
:param step_conf: The description of the step. This may be a
scalar string or a dictionary.
:returns: A list of steps.
"""
# Make sure the step makes sense
if isinstance(step_conf, six.string_types):
# Convert string to a dict for uniformity of processing
step_conf = {step_conf: None}
elif not isinstance(step_conf, collections.Mapping):
raise ConfigError(
'Unable to parse step configuration: expecting string or '
'dictionary, not "%s"' % step_conf.__class__.__name__,
step_addr,
)
# Parse the configuration into the action and modifier classes
# and the configuration to apply to each
action_item = None
mod_items = {}
kwargs = {} # extra args for Step.__init__()
for key, key_conf in step_conf.items():
# Handle special keys first
if key in cls.schemas:
# Validate the key
utils.schema_validate(key_conf, cls.schemas[key], ConfigError,
key, step_addr=step_addr)
# Save the value
kwargs[key] = key_conf
# Is it an action?
elif key in entry.points[NAMESPACE_ACTION]:
if action_item is not None:
raise ConfigError(
'Bad step configuration: action "%s" specified, '
'but action "%s" already processed' %
(key, action_item.name),
step_addr,
)
action_item = StepItem(
entry.points[NAMESPACE_ACTION][key], key, key_conf)
# OK, is it a modifier?
elif key in entry.points[NAMESPACE_MODIFIER]:
mod_class = entry.points[NAMESPACE_MODIFIER][key]
# Store it in priority order
mod_items.setdefault(mod_class.priority, [])
mod_items[mod_class.priority].append(StepItem(
mod_class, key, key_conf))
# Couldn't resolve it
else:
raise ConfigError(
'Bad step configuration: unable to resolve action '
'"%s"' % key,
step_addr,
)
# Make sure we have an action
if action_item is None:
raise ConfigError(
'Bad step configuration: no action specified',
step_addr,
)
# What is the action type?
action_type = (Modifier.STEP if action_item.cls.step_action
else Modifier.NORMAL)
# OK, build our modifiers list and preprocess the action
# configuration
modifiers = []
for mod_item in utils.iter_prio_dict(mod_items):
# Verify that the modifier is compatible with the
# action
if mod_item.cls.restriction & action_type == 0:
raise ConfigError(
'Bad step configuration: modifier "%s" is '
'incompatible with the action "%s"' %
(mod_item.name, action_item.name),
step_addr,
)
# Initialize the modifier
modifier = mod_item.init(ctxt, step_addr)
# Add it to the list of modifiers
modifiers.append(modifier)
# Apply the modifier's configuration processing
action_item.conf = modifier.action_conf(
ctxt, action_item.cls, action_item.name, action_item.conf,
step_addr)
# Now we can initialize the action
action = action_item.init(ctxt, step_addr)
# Create the step
step = cls(step_addr, action, modifiers, **kwargs)
# If the final_action is a StepAction, invoke it now and
# return the list of steps. We do this after creating the
# Step object so that we can take advantage of its handling of
# modifiers.
if action_item.cls.step_action:
return step(ctxt)
# Not a step action, return the step as a list of one element
return [step] |
def init_crash_handler(self):
"""Create a crash handler, typically setting sys.excepthook to it."""
self.crash_handler = self.crash_handler_class(self)
sys.excepthook = self.excepthook
def unset_crashhandler():
sys.excepthook = sys.__excepthook__
atexit.register(unset_crashhandler) |
def excepthook(self, etype, evalue, tb):
"""this is sys.excepthook after init_crashhandler
set self.verbose_crash=True to use our full crashhandler, instead of
a regular traceback with a short message (crash_handler_lite)
"""
if self.verbose_crash:
return self.crash_handler(etype, evalue, tb)
else:
return crashhandler.crash_handler_lite(etype, evalue, tb) |
def load_config_file(self, suppress_errors=True):
"""Load the config file.
By default, errors in loading config are handled, and a warning
printed on screen. For testing, the suppress_errors option is set
to False, so errors will make tests fail.
"""
self.log.debug("Searching path %s for config files", self.config_file_paths)
base_config = 'ipython_config.py'
self.log.debug("Attempting to load config file: %s" %
base_config)
try:
Application.load_config_file(
self,
base_config,
path=self.config_file_paths
)
except ConfigFileNotFound:
# ignore errors loading parent
self.log.debug("Config file %s not found", base_config)
pass
if self.config_file_name == base_config:
# don't load secondary config
return
self.log.debug("Attempting to load config file: %s" %
self.config_file_name)
try:
Application.load_config_file(
self,
self.config_file_name,
path=self.config_file_paths
)
except ConfigFileNotFound:
# Only warn if the default config file was NOT being used.
if self.config_file_specified:
msg = self.log.warn
else:
msg = self.log.debug
msg("Config file not found, skipping: %s", self.config_file_name)
except:
# For testing purposes.
if not suppress_errors:
raise
self.log.warn("Error loading config file: %s" %
self.config_file_name, exc_info=True) |
def init_profile_dir(self):
"""initialize the profile dir"""
try:
# location explicitly specified:
location = self.config.ProfileDir.location
except AttributeError:
# location not specified, find by profile name
try:
p = ProfileDir.find_profile_dir_by_name(self.ipython_dir, self.profile, self.config)
except ProfileDirError:
# not found, maybe create it (always create default profile)
if self.auto_create or self.profile=='default':
try:
p = ProfileDir.create_profile_dir_by_name(self.ipython_dir, self.profile, self.config)
except ProfileDirError:
self.log.fatal("Could not create profile: %r"%self.profile)
self.exit(1)
else:
self.log.info("Created profile dir: %r"%p.location)
else:
self.log.fatal("Profile %r not found."%self.profile)
self.exit(1)
else:
self.log.info("Using existing profile dir: %r"%p.location)
else:
# location is fully specified
try:
p = ProfileDir.find_profile_dir(location, self.config)
except ProfileDirError:
# not found, maybe create it
if self.auto_create:
try:
p = ProfileDir.create_profile_dir(location, self.config)
except ProfileDirError:
self.log.fatal("Could not create profile directory: %r"%location)
self.exit(1)
else:
self.log.info("Creating new profile dir: %r"%location)
else:
self.log.fatal("Profile directory %r not found."%location)
self.exit(1)
else:
self.log.info("Using existing profile dir: %r"%location)
self.profile_dir = p
self.config_file_paths.append(p.location) |
def init_config_files(self):
"""[optionally] copy default config files into profile dir."""
# copy config files
path = self.builtin_profile_dir
if self.copy_config_files:
src = self.profile
cfg = self.config_file_name
if path and os.path.exists(os.path.join(path, cfg)):
self.log.warn("Staging %r from %s into %r [overwrite=%s]"%(
cfg, src, self.profile_dir.location, self.overwrite)
)
self.profile_dir.copy_config_file(cfg, path=path, overwrite=self.overwrite)
else:
self.stage_default_config_file()
else:
# Still stage *bundled* config files, but not generated ones
# This is necessary for `ipython profile=sympy` to load the profile
# on the first go
files = glob.glob(os.path.join(path, '*.py'))
for fullpath in files:
cfg = os.path.basename(fullpath)
if self.profile_dir.copy_config_file(cfg, path=path, overwrite=False):
# file was copied
self.log.warn("Staging bundled %s from %s into %r"%(
cfg, self.profile, self.profile_dir.location)
) |
def stage_default_config_file(self):
"""auto generate default config file, and stage it into the profile."""
s = self.generate_config_file()
fname = os.path.join(self.profile_dir.location, self.config_file_name)
if self.overwrite or not os.path.exists(fname):
self.log.warn("Generating default config file: %r"%(fname))
with open(fname, 'w') as f:
f.write(s) |
def read(self):
"""Read coverage data from the coverage data file (if it exists)."""
if self.use_file:
self.lines, self.arcs = self._read_file(self.filename)
else:
self.lines, self.arcs = {}, {} |
def write(self, suffix=None):
"""Write the collected coverage data to a file.
`suffix` is a suffix to append to the base file name. This can be used
for multiple or parallel execution, so that many coverage data files
can exist simultaneously. A dot will be used to join the base name and
the suffix.
"""
if self.use_file:
filename = self.filename
if suffix:
filename += "." + suffix
self.write_file(filename) |
def erase(self):
"""Erase the data, both in this object, and from its file storage."""
if self.use_file:
if self.filename:
file_be_gone(self.filename)
self.lines = {}
self.arcs = {} |
def line_data(self):
"""Return the map from filenames to lists of line numbers executed."""
return dict(
[(f, sorted(lmap.keys())) for f, lmap in iitems(self.lines)]
) |
def arc_data(self):
"""Return the map from filenames to lists of line number pairs."""
return dict(
[(f, sorted(amap.keys())) for f, amap in iitems(self.arcs)]
) |
def write_file(self, filename):
"""Write the coverage data to `filename`."""
# Create the file data.
data = {}
data['lines'] = self.line_data()
arcs = self.arc_data()
if arcs:
data['arcs'] = arcs
if self.collector:
data['collector'] = self.collector
if self.debug and self.debug.should('dataio'):
self.debug.write("Writing data to %r" % (filename,))
# Write the pickle to the file.
fdata = open(filename, 'wb')
try:
pickle.dump(data, fdata, 2)
finally:
fdata.close() |
def read_file(self, filename):
"""Read the coverage data from `filename`."""
self.lines, self.arcs = self._read_file(filename) |
def raw_data(self, filename):
"""Return the raw pickled data from `filename`."""
if self.debug and self.debug.should('dataio'):
self.debug.write("Reading data from %r" % (filename,))
fdata = open(filename, 'rb')
try:
data = pickle.load(fdata)
finally:
fdata.close()
return data |
def _read_file(self, filename):
"""Return the stored coverage data from the given file.
Returns two values, suitable for assigning to `self.lines` and
`self.arcs`.
"""
lines = {}
arcs = {}
try:
data = self.raw_data(filename)
if isinstance(data, dict):
# Unpack the 'lines' item.
lines = dict([
(f, dict.fromkeys(linenos, None))
for f, linenos in iitems(data.get('lines', {}))
])
# Unpack the 'arcs' item.
arcs = dict([
(f, dict.fromkeys(arcpairs, None))
for f, arcpairs in iitems(data.get('arcs', {}))
])
except Exception:
pass
return lines, arcs |
def combine_parallel_data(self, aliases=None):
"""Combine a number of data files together.
Treat `self.filename` as a file prefix, and combine the data from all
of the data files starting with that prefix plus a dot.
If `aliases` is provided, it's a `PathAliases` object that is used to
re-map paths to match the local machine's.
"""
aliases = aliases or PathAliases()
data_dir, local = os.path.split(self.filename)
localdot = local + '.'
for f in os.listdir(data_dir or '.'):
if f.startswith(localdot):
full_path = os.path.join(data_dir, f)
new_lines, new_arcs = self._read_file(full_path)
for filename, file_data in iitems(new_lines):
filename = aliases.map(filename)
self.lines.setdefault(filename, {}).update(file_data)
for filename, file_data in iitems(new_arcs):
filename = aliases.map(filename)
self.arcs.setdefault(filename, {}).update(file_data)
if f != local:
os.remove(full_path) |
def add_line_data(self, line_data):
"""Add executed line data.
`line_data` is { filename: { lineno: None, ... }, ...}
"""
for filename, linenos in iitems(line_data):
self.lines.setdefault(filename, {}).update(linenos) |
def add_arc_data(self, arc_data):
"""Add measured arc data.
`arc_data` is { filename: { (l1,l2): None, ... }, ...}
"""
for filename, arcs in iitems(arc_data):
self.arcs.setdefault(filename, {}).update(arcs) |
def add_to_hash(self, filename, hasher):
"""Contribute `filename`'s data to the Md5Hash `hasher`."""
hasher.update(self.executed_lines(filename))
hasher.update(self.executed_arcs(filename)) |
def summary(self, fullpath=False):
"""Return a dict summarizing the coverage data.
Keys are based on the filenames, and values are the number of executed
lines. If `fullpath` is true, then the keys are the full pathnames of
the files, otherwise they are the basenames of the files.
"""
summ = {}
if fullpath:
filename_fn = lambda f: f
else:
filename_fn = os.path.basename
for filename, lines in iitems(self.lines):
summ[filename_fn(filename)] = len(lines)
return summ |
def get_pasted_lines(sentinel, l_input=py3compat.input):
""" Yield pasted lines until the user enters the given sentinel value.
"""
print "Pasting code; enter '%s' alone on the line to stop or use Ctrl-D." \
% sentinel
while True:
try:
l = l_input(':')
if l == sentinel:
return
else:
yield l
except EOFError:
print '<EOF>'
return |
def mainloop(self, display_banner=None):
"""Start the mainloop.
If an optional banner argument is given, it will override the
internally created default banner.
"""
with nested(self.builtin_trap, self.display_trap):
while 1:
try:
self.interact(display_banner=display_banner)
#self.interact_with_readline()
# XXX for testing of a readline-decoupled repl loop, call
# interact_with_readline above
break
except KeyboardInterrupt:
# this should not be necessary, but KeyboardInterrupt
# handling seems rather unpredictable...
self.write("\nKeyboardInterrupt in interact()\n") |
def _replace_rlhist_multiline(self, source_raw, hlen_before_cell):
"""Store multiple lines as a single entry in history"""
# do nothing without readline or disabled multiline
if not self.has_readline or not self.multiline_history:
return hlen_before_cell
# windows rl has no remove_history_item
if not hasattr(self.readline, "remove_history_item"):
return hlen_before_cell
# skip empty cells
if not source_raw.rstrip():
return hlen_before_cell
# nothing changed do nothing, e.g. when rl removes consecutive dups
hlen = self.readline.get_current_history_length()
if hlen == hlen_before_cell:
return hlen_before_cell
for i in range(hlen - hlen_before_cell):
self.readline.remove_history_item(hlen - i - 1)
stdin_encoding = get_stream_enc(sys.stdin, 'utf-8')
self.readline.add_history(py3compat.unicode_to_str(source_raw.rstrip(),
stdin_encoding))
return self.readline.get_current_history_length() |
def interact(self, display_banner=None):
"""Closely emulate the interactive Python console."""
# batch run -> do not interact
if self.exit_now:
return
if display_banner is None:
display_banner = self.display_banner
if isinstance(display_banner, basestring):
self.show_banner(display_banner)
elif display_banner:
self.show_banner()
more = False
if self.has_readline:
self.readline_startup_hook(self.pre_readline)
hlen_b4_cell = self.readline.get_current_history_length()
else:
hlen_b4_cell = 0
# exit_now is set by a call to %Exit or %Quit, through the
# ask_exit callback.
while not self.exit_now:
self.hooks.pre_prompt_hook()
if more:
try:
prompt = self.prompt_manager.render('in2')
except:
self.showtraceback()
if self.autoindent:
self.rl_do_indent = True
else:
try:
prompt = self.separate_in + self.prompt_manager.render('in')
except:
self.showtraceback()
try:
line = self.raw_input(prompt)
if self.exit_now:
# quick exit on sys.std[in|out] close
break
if self.autoindent:
self.rl_do_indent = False
except KeyboardInterrupt:
#double-guard against keyboardinterrupts during kbdint handling
try:
self.write('\nKeyboardInterrupt\n')
source_raw = self.input_splitter.source_raw_reset()[1]
hlen_b4_cell = \
self._replace_rlhist_multiline(source_raw, hlen_b4_cell)
more = False
except KeyboardInterrupt:
pass
except EOFError:
if self.autoindent:
self.rl_do_indent = False
if self.has_readline:
self.readline_startup_hook(None)
self.write('\n')
self.exit()
except bdb.BdbQuit:
warn('The Python debugger has exited with a BdbQuit exception.\n'
'Because of how pdb handles the stack, it is impossible\n'
'for IPython to properly format this particular exception.\n'
'IPython will resume normal operation.')
except:
# exceptions here are VERY RARE, but they can be triggered
# asynchronously by signal handlers, for example.
self.showtraceback()
else:
self.input_splitter.push(line)
more = self.input_splitter.push_accepts_more()
if (self.SyntaxTB.last_syntax_error and
self.autoedit_syntax):
self.edit_syntax_error()
if not more:
source_raw = self.input_splitter.source_raw_reset()[1]
self.run_cell(source_raw, store_history=True)
hlen_b4_cell = \
self._replace_rlhist_multiline(source_raw, hlen_b4_cell)
# Turn off the exit flag, so the mainloop can be restarted if desired
self.exit_now = False |
def raw_input(self, prompt=''):
"""Write a prompt and read a line.
The returned line does not include the trailing newline.
When the user enters the EOF key sequence, EOFError is raised.
Optional inputs:
- prompt(''): a string to be printed to prompt the user.
- continue_prompt(False): whether this line is the first one or a
continuation in a sequence of inputs.
"""
# Code run by the user may have modified the readline completer state.
# We must ensure that our completer is back in place.
if self.has_readline:
self.set_readline_completer()
# raw_input expects str, but we pass it unicode sometimes
prompt = py3compat.cast_bytes_py2(prompt)
try:
line = py3compat.str_to_unicode(self.raw_input_original(prompt))
except ValueError:
warn("\n********\nYou or a %run:ed script called sys.stdin.close()"
" or sys.stdout.close()!\nExiting IPython!\n")
self.ask_exit()
return ""
# Try to be reasonably smart about not re-indenting pasted input more
# than necessary. We do this by trimming out the auto-indent initial
# spaces, if the user's actual input started itself with whitespace.
if self.autoindent:
if num_ini_spaces(line) > self.indent_current_nsp:
line = line[self.indent_current_nsp:]
self.indent_current_nsp = 0
return line |
def edit_syntax_error(self):
"""The bottom half of the syntax error handler called in the main loop.
Loop until syntax error is fixed or user cancels.
"""
while self.SyntaxTB.last_syntax_error:
# copy and clear last_syntax_error
err = self.SyntaxTB.clear_err_state()
if not self._should_recompile(err):
return
try:
# may set last_syntax_error again if a SyntaxError is raised
self.safe_execfile(err.filename,self.user_ns)
except:
self.showtraceback()
else:
try:
f = open(err.filename)
try:
# This should be inside a display_trap block and I
# think it is.
sys.displayhook(f.read())
finally:
f.close()
except:
self.showtraceback() |
def _should_recompile(self,e):
"""Utility routine for edit_syntax_error"""
if e.filename in ('<ipython console>','<input>','<string>',
'<console>','<BackgroundJob compilation>',
None):
return False
try:
if (self.autoedit_syntax and
not self.ask_yes_no('Return to editor to correct syntax error? '
'[Y/n] ','y')):
return False
except EOFError:
return False
def int0(x):
try:
return int(x)
except TypeError:
return 0
# always pass integer line and offset values to editor hook
try:
self.hooks.fix_error_editor(e.filename,
int0(e.lineno),int0(e.offset),e.msg)
except TryNext:
warn('Could not open editor')
return False
return True |
def exit(self):
"""Handle interactive exit.
This method calls the ask_exit callback."""
if self.confirm_exit:
if self.ask_yes_no('Do you really want to exit ([y]/n)?','y'):
self.ask_exit()
else:
self.ask_exit() |
def get_url_rev(self):
"""
Returns the correct repository URL and revision by parsing the given
repository URL
"""
error_message= (
"Sorry, '%s' is a malformed VCS url. "
"Ihe format is <vcs>+<protocol>://<url>, "
"e.g. svn+http://myrepo/svn/MyApp#egg=MyApp")
assert '+' in self.url, error_message % self.url
url = self.url.split('+', 1)[1]
scheme, netloc, path, query, frag = urlparse.urlsplit(url)
rev = None
if '@' in path:
path, rev = path.rsplit('@', 1)
url = urlparse.urlunsplit((scheme, netloc, path, query, ''))
return url, rev |
def dispose_at_exit(exitable):
'''
register `exitable.__exit__()` into `atexit` module.
return the `exitable` itself.
'''
@atexit.register
def callback():
exitable.__exit__(*sys.exc_info())
return exitable |
def new_frontend_master(self):
""" Create and return new frontend attached to new kernel, launched on localhost.
"""
ip = self.ip if self.ip in LOCAL_IPS else LOCALHOST
kernel_manager = self.kernel_manager_class(
ip=ip,
connection_file=self._new_connection_file(),
config=self.config,
)
# start the kernel
kwargs = dict()
kwargs['extra_arguments'] = self.kernel_argv
kernel_manager.start_kernel(**kwargs)
kernel_manager.start_channels()
widget = self.widget_factory(config=self.config,
local_kernel=True)
self.init_colors(widget)
widget.kernel_manager = kernel_manager
widget._existing = False
widget._may_close = True
widget._confirm_exit = self.confirm_exit
return widget |
def new_frontend_slave(self, current_widget):
"""Create and return a new frontend attached to an existing kernel.
Parameters
----------
current_widget : IPythonWidget
The IPythonWidget whose kernel this frontend is to share
"""
kernel_manager = self.kernel_manager_class(
connection_file=current_widget.kernel_manager.connection_file,
config = self.config,
)
kernel_manager.load_connection_file()
kernel_manager.start_channels()
widget = self.widget_factory(config=self.config,
local_kernel=False)
self.init_colors(widget)
widget._existing = True
widget._may_close = False
widget._confirm_exit = False
widget.kernel_manager = kernel_manager
return widget |
def init_colors(self, widget):
"""Configure the coloring of the widget"""
# Note: This will be dramatically simplified when colors
# are removed from the backend.
# parse the colors arg down to current known labels
try:
colors = self.config.ZMQInteractiveShell.colors
except AttributeError:
colors = None
try:
style = self.config.IPythonWidget.syntax_style
except AttributeError:
style = None
try:
sheet = self.config.IPythonWidget.style_sheet
except AttributeError:
sheet = None
# find the value for colors:
if colors:
colors=colors.lower()
if colors in ('lightbg', 'light'):
colors='lightbg'
elif colors in ('dark', 'linux'):
colors='linux'
else:
colors='nocolor'
elif style:
if style=='bw':
colors='nocolor'
elif styles.dark_style(style):
colors='linux'
else:
colors='lightbg'
else:
colors=None
# Configure the style
if style:
widget.style_sheet = styles.sheet_from_template(style, colors)
widget.syntax_style = style
widget._syntax_style_changed()
widget._style_sheet_changed()
elif colors:
# use a default dark/light/bw style
widget.set_default_style(colors=colors)
if self.stylesheet:
# we got an explicit stylesheet
if os.path.isfile(self.stylesheet):
with open(self.stylesheet) as f:
sheet = f.read()
else:
raise IOError("Stylesheet %r not found." % self.stylesheet)
if sheet:
widget.style_sheet = sheet
widget._style_sheet_changed() |
def info(self):
"""return the connection info for this object's sockets."""
return (self.identity, self.url, self.pub_url, self.location) |
def connect(self, peers):
"""connect to peers. `peers` will be a dict of 4-tuples, keyed by name.
{peer : (ident, addr, pub_addr, location)}
where peer is the name, ident is the XREP identity, addr,pub_addr are the
"""
for peer, (ident, url, pub_url, location) in peers.items():
self.peers[peer] = ident
if ident != self.identity:
self.sub.connect(disambiguate_url(pub_url, location))
if ident > self.identity:
# prevent duplicate xrep, by only connecting
# engines to engines with higher IDENTITY
# a doubly-connected pair will crash
self.socket.connect(disambiguate_url(url, location)) |
def Rconverter(Robj, dataframe=False):
"""
Convert an object in R's namespace to one suitable
for ipython's namespace.
For a data.frame, it tries to return a structured array.
It first checks for colnames, then names.
If all are NULL, it returns np.asarray(Robj), else
it tries to construct a recarray
Parameters
----------
Robj: an R object returned from rpy2
"""
is_data_frame = ro.r('is.data.frame')
colnames = ro.r('colnames')
rownames = ro.r('rownames') # with pandas, these could be used for the index
names = ro.r('names')
if dataframe:
as_data_frame = ro.r('as.data.frame')
cols = colnames(Robj)
_names = names(Robj)
if cols != ri.NULL:
Robj = as_data_frame(Robj)
names = tuple(np.array(cols))
elif _names != ri.NULL:
names = tuple(np.array(_names))
else: # failed to find names
return np.asarray(Robj)
Robj = np.rec.fromarrays(Robj, names = names)
return np.asarray(Robj) |
def findsource(object):
"""Return the entire source file and starting line number for an object.
The argument may be a module, class, method, function, traceback, frame,
or code object. The source code is returned as a list of all the lines
in the file and the line number indexes a line in that list. An IOError
is raised if the source code cannot be retrieved.
FIXED version with which we monkeypatch the stdlib to work around a bug."""
file = getsourcefile(object) or getfile(object)
# If the object is a frame, then trying to get the globals dict from its
# module won't work. Instead, the frame object itself has the globals
# dictionary.
globals_dict = None
if inspect.isframe(object):
# XXX: can this ever be false?
globals_dict = object.f_globals
else:
module = getmodule(object, file)
if module:
globals_dict = module.__dict__
lines = linecache.getlines(file, globals_dict)
if not lines:
raise IOError('could not get source code')
if ismodule(object):
return lines, 0
if isclass(object):
name = object.__name__
pat = re.compile(r'^(\s*)class\s*' + name + r'\b')
# make some effort to find the best matching class definition:
# use the one with the least indentation, which is the one
# that's most probably not inside a function definition.
candidates = []
for i in range(len(lines)):
match = pat.match(lines[i])
if match:
# if it's at toplevel, it's already the best one
if lines[i][0] == 'c':
return lines, i
# else add whitespace to candidate list
candidates.append((match.group(1), i))
if candidates:
# this will sort by whitespace, and by line number,
# less whitespace first
candidates.sort()
return lines, candidates[0][1]
else:
raise IOError('could not find class definition')
if ismethod(object):
object = object.im_func
if isfunction(object):
object = object.func_code
if istraceback(object):
object = object.tb_frame
if isframe(object):
object = object.f_code
if iscode(object):
if not hasattr(object, 'co_firstlineno'):
raise IOError('could not find function definition')
pat = re.compile(r'^(\s*def\s)|(.*(?<!\w)lambda(:|\s))|^(\s*@)')
pmatch = pat.match
# fperez - fix: sometimes, co_firstlineno can give a number larger than
# the length of lines, which causes an error. Safeguard against that.
lnum = min(object.co_firstlineno,len(lines))-1
while lnum > 0:
if pmatch(lines[lnum]): break
lnum -= 1
return lines, lnum
raise IOError('could not find code object') |
def fix_frame_records_filenames(records):
"""Try to fix the filenames in each record from inspect.getinnerframes().
Particularly, modules loaded from within zip files have useless filenames
attached to their code object, and inspect.getinnerframes() just uses it.
"""
fixed_records = []
for frame, filename, line_no, func_name, lines, index in records:
# Look inside the frame's globals dictionary for __file__, which should
# be better.
better_fn = frame.f_globals.get('__file__', None)
if isinstance(better_fn, str):
# Check the type just in case someone did something weird with
# __file__. It might also be None if the error occurred during
# import.
filename = better_fn
fixed_records.append((frame, filename, line_no, func_name, lines, index))
return fixed_records |
def set_colors(self,*args,**kw):
"""Shorthand access to the color table scheme selector method."""
# Set own color table
self.color_scheme_table.set_active_scheme(*args,**kw)
# for convenience, set Colors to the active scheme
self.Colors = self.color_scheme_table.active_colors
# Also set colors of debugger
if hasattr(self,'pdb') and self.pdb is not None:
self.pdb.set_colors(*args,**kw) |
def color_toggle(self):
"""Toggle between the currently active color scheme and NoColor."""
if self.color_scheme_table.active_scheme_name == 'NoColor':
self.color_scheme_table.set_active_scheme(self.old_scheme)
self.Colors = self.color_scheme_table.active_colors
else:
self.old_scheme = self.color_scheme_table.active_scheme_name
self.color_scheme_table.set_active_scheme('NoColor')
self.Colors = self.color_scheme_table.active_colors |
def text(self, etype, value, tb, tb_offset=None, context=5):
"""Return formatted traceback.
Subclasses may override this if they add extra arguments.
"""
tb_list = self.structured_traceback(etype, value, tb,
tb_offset, context)
return self.stb2text(tb_list) |
def structured_traceback(self, etype, value, elist, tb_offset=None,
context=5):
"""Return a color formatted string with the traceback info.
Parameters
----------
etype : exception type
Type of the exception raised.
value : object
Data stored in the exception
elist : list
List of frames, see class docstring for details.
tb_offset : int, optional
Number of frames in the traceback to skip. If not given, the
instance value is used (set in constructor).
context : int, optional
Number of lines of context information to print.
Returns
-------
String with formatted exception.
"""
tb_offset = self.tb_offset if tb_offset is None else tb_offset
Colors = self.Colors
out_list = []
if elist:
if tb_offset and len(elist) > tb_offset:
elist = elist[tb_offset:]
out_list.append('Traceback %s(most recent call last)%s:' %
(Colors.normalEm, Colors.Normal) + '\n')
out_list.extend(self._format_list(elist))
# The exception info should be a single entry in the list.
lines = ''.join(self._format_exception_only(etype, value))
out_list.append(lines)
# Note: this code originally read:
## for line in lines[:-1]:
## out_list.append(" "+line)
## out_list.append(lines[-1])
# This means it was indenting everything but the last line by a little
# bit. I've disabled this for now, but if we see ugliness somewhre we
# can restore it.
return out_list |
def _format_list(self, extracted_list):
"""Format a list of traceback entry tuples for printing.
Given a list of tuples as returned by extract_tb() or
extract_stack(), return a list of strings ready for printing.
Each string in the resulting list corresponds to the item with the
same index in the argument list. Each string ends in a newline;
the strings may contain internal newlines as well, for those items
whose source text line is not None.
Lifted almost verbatim from traceback.py
"""
Colors = self.Colors
list = []
for filename, lineno, name, line in extracted_list[:-1]:
item = ' File %s"%s"%s, line %s%d%s, in %s%s%s\n' % \
(Colors.filename, filename, Colors.Normal,
Colors.lineno, lineno, Colors.Normal,
Colors.name, name, Colors.Normal)
if line:
item += ' %s\n' % line.strip()
list.append(item)
# Emphasize the last entry
filename, lineno, name, line = extracted_list[-1]
item = '%s File %s"%s"%s, line %s%d%s, in %s%s%s%s\n' % \
(Colors.normalEm,
Colors.filenameEm, filename, Colors.normalEm,
Colors.linenoEm, lineno, Colors.normalEm,
Colors.nameEm, name, Colors.normalEm,
Colors.Normal)
if line:
item += '%s %s%s\n' % (Colors.line, line.strip(),
Colors.Normal)
list.append(item)
#from pprint import pformat; print 'LISTTB', pformat(list) # dbg
return list |
def _format_exception_only(self, etype, value):
"""Format the exception part of a traceback.
The arguments are the exception type and value such as given by
sys.exc_info()[:2]. The return value is a list of strings, each ending
in a newline. Normally, the list contains a single string; however,
for SyntaxError exceptions, it contains several lines that (when
printed) display detailed information about where the syntax error
occurred. The message indicating which exception occurred is the
always last string in the list.
Also lifted nearly verbatim from traceback.py
"""
have_filedata = False
Colors = self.Colors
list = []
stype = Colors.excName + etype.__name__ + Colors.Normal
if value is None:
# Not sure if this can still happen in Python 2.6 and above
list.append( str(stype) + '\n')
else:
if etype is SyntaxError:
have_filedata = True
#print 'filename is',filename # dbg
if not value.filename: value.filename = "<string>"
list.append('%s File %s"%s"%s, line %s%d%s\n' % \
(Colors.normalEm,
Colors.filenameEm, value.filename, Colors.normalEm,
Colors.linenoEm, value.lineno, Colors.Normal ))
if value.text is not None:
i = 0
while i < len(value.text) and value.text[i].isspace():
i += 1
list.append('%s %s%s\n' % (Colors.line,
value.text.strip(),
Colors.Normal))
if value.offset is not None:
s = ' '
for c in value.text[i:value.offset-1]:
if c.isspace():
s += c
else:
s += ' '
list.append('%s%s^%s\n' % (Colors.caret, s,
Colors.Normal) )
try:
s = value.msg
except Exception:
s = self._some_str(value)
if s:
list.append('%s%s:%s %s\n' % (str(stype), Colors.excName,
Colors.Normal, s))
else:
list.append('%s\n' % str(stype))
# sync with user hooks
if have_filedata:
ipinst = ipapi.get()
if ipinst is not None:
ipinst.hooks.synchronize_with_editor(value.filename, value.lineno, 0)
return list |
def show_exception_only(self, etype, evalue):
"""Only print the exception type and message, without a traceback.
Parameters
----------
etype : exception type
value : exception value
"""
# This method needs to use __call__ from *this* class, not the one from
# a subclass whose signature or behavior may be different
ostream = self.ostream
ostream.flush()
ostream.write('\n'.join(self.get_exception_only(etype, evalue)))
ostream.flush() |
def structured_traceback(self, etype, evalue, etb, tb_offset=None,
context=5):
"""Return a nice text document describing the traceback."""
tb_offset = self.tb_offset if tb_offset is None else tb_offset
# some locals
try:
etype = etype.__name__
except AttributeError:
pass
Colors = self.Colors # just a shorthand + quicker name lookup
ColorsNormal = Colors.Normal # used a lot
col_scheme = self.color_scheme_table.active_scheme_name
indent = ' '*INDENT_SIZE
em_normal = '%s\n%s%s' % (Colors.valEm, indent,ColorsNormal)
undefined = '%sundefined%s' % (Colors.em, ColorsNormal)
exc = '%s%s%s' % (Colors.excName,etype,ColorsNormal)
# some internal-use functions
def text_repr(value):
"""Hopefully pretty robust repr equivalent."""
# this is pretty horrible but should always return *something*
try:
return pydoc.text.repr(value)
except KeyboardInterrupt:
raise
except:
try:
return repr(value)
except KeyboardInterrupt:
raise
except:
try:
# all still in an except block so we catch
# getattr raising
name = getattr(value, '__name__', None)
if name:
# ick, recursion
return text_repr(name)
klass = getattr(value, '__class__', None)
if klass:
return '%s instance' % text_repr(klass)
except KeyboardInterrupt:
raise
except:
return 'UNRECOVERABLE REPR FAILURE'
def eqrepr(value, repr=text_repr): return '=%s' % repr(value)
def nullrepr(value, repr=text_repr): return ''
# meat of the code begins
try:
etype = etype.__name__
except AttributeError:
pass
if self.long_header:
# Header with the exception type, python version, and date
pyver = 'Python ' + sys.version.split()[0] + ': ' + sys.executable
date = time.ctime(time.time())
head = '%s%s%s\n%s%s%s\n%s' % (Colors.topline, '-'*75, ColorsNormal,
exc, ' '*(75-len(str(etype))-len(pyver)),
pyver, date.rjust(75) )
head += "\nA problem occured executing Python code. Here is the sequence of function"\
"\ncalls leading up to the error, with the most recent (innermost) call last."
else:
# Simplified header
head = '%s%s%s\n%s%s' % (Colors.topline, '-'*75, ColorsNormal,exc,
'Traceback (most recent call last)'.\
rjust(75 - len(str(etype)) ) )
frames = []
# Flush cache before calling inspect. This helps alleviate some of the
# problems with python 2.3's inspect.py.
##self.check_cache()
# Drop topmost frames if requested
try:
# Try the default getinnerframes and Alex's: Alex's fixes some
# problems, but it generates empty tracebacks for console errors
# (5 blanks lines) where none should be returned.
#records = inspect.getinnerframes(etb, context)[tb_offset:]
#print 'python records:', records # dbg
records = _fixed_getinnerframes(etb, context, tb_offset)
#print 'alex records:', records # dbg
except:
# FIXME: I've been getting many crash reports from python 2.3
# users, traceable to inspect.py. If I can find a small test-case
# to reproduce this, I should either write a better workaround or
# file a bug report against inspect (if that's the real problem).
# So far, I haven't been able to find an isolated example to
# reproduce the problem.
inspect_error()
traceback.print_exc(file=self.ostream)
info('\nUnfortunately, your original traceback can not be constructed.\n')
return ''
# build some color string templates outside these nested loops
tpl_link = '%s%%s%s' % (Colors.filenameEm,ColorsNormal)
tpl_call = 'in %s%%s%s%%s%s' % (Colors.vName, Colors.valEm,
ColorsNormal)
tpl_call_fail = 'in %s%%s%s(***failed resolving arguments***)%s' % \
(Colors.vName, Colors.valEm, ColorsNormal)
tpl_local_var = '%s%%s%s' % (Colors.vName, ColorsNormal)
tpl_global_var = '%sglobal%s %s%%s%s' % (Colors.em, ColorsNormal,
Colors.vName, ColorsNormal)
tpl_name_val = '%%s %s= %%s%s' % (Colors.valEm, ColorsNormal)
tpl_line = '%s%%s%s %%s' % (Colors.lineno, ColorsNormal)
tpl_line_em = '%s%%s%s %%s%s' % (Colors.linenoEm,Colors.line,
ColorsNormal)
# now, loop over all records printing context and info
abspath = os.path.abspath
for frame, file, lnum, func, lines, index in records:
#print '*** record:',file,lnum,func,lines,index # dbg
if not file:
file = '?'
elif not(file.startswith("<") and file.endswith(">")):
# Guess that filenames like <string> aren't real filenames, so
# don't call abspath on them.
try:
file = abspath(file)
except OSError:
# Not sure if this can still happen: abspath now works with
# file names like <string>
pass
link = tpl_link % file
args, varargs, varkw, locals = inspect.getargvalues(frame)
if func == '?':
call = ''
else:
# Decide whether to include variable details or not
var_repr = self.include_vars and eqrepr or nullrepr
try:
call = tpl_call % (func,inspect.formatargvalues(args,
varargs, varkw,
locals,formatvalue=var_repr))
except KeyError:
# This happens in situations like errors inside generator
# expressions, where local variables are listed in the
# line, but can't be extracted from the frame. I'm not
# 100% sure this isn't actually a bug in inspect itself,
# but since there's no info for us to compute with, the
# best we can do is report the failure and move on. Here
# we must *not* call any traceback construction again,
# because that would mess up use of %debug later on. So we
# simply report the failure and move on. The only
# limitation will be that this frame won't have locals
# listed in the call signature. Quite subtle problem...
# I can't think of a good way to validate this in a unit
# test, but running a script consisting of:
# dict( (k,v.strip()) for (k,v) in range(10) )
# will illustrate the error, if this exception catch is
# disabled.
call = tpl_call_fail % func
# Don't attempt to tokenize binary files.
if file.endswith(('.so', '.pyd', '.dll')):
frames.append('%s %s\n' % (link,call))
continue
elif file.endswith(('.pyc','.pyo')):
# Look up the corresponding source file.
file = pyfile.source_from_cache(file)
def linereader(file=file, lnum=[lnum], getline=linecache.getline):
line = getline(file, lnum[0])
lnum[0] += 1
return line
# Build the list of names on this line of code where the exception
# occurred.
try:
names = []
name_cont = False
for token_type, token, start, end, line in generate_tokens(linereader):
# build composite names
if token_type == tokenize.NAME and token not in keyword.kwlist:
if name_cont:
# Continuation of a dotted name
try:
names[-1].append(token)
except IndexError:
names.append([token])
name_cont = False
else:
# Regular new names. We append everything, the caller
# will be responsible for pruning the list later. It's
# very tricky to try to prune as we go, b/c composite
# names can fool us. The pruning at the end is easy
# to do (or the caller can print a list with repeated
# names if so desired.
names.append([token])
elif token == '.':
name_cont = True
elif token_type == tokenize.NEWLINE:
break
except (IndexError, UnicodeDecodeError):
# signals exit of tokenizer
pass
except tokenize.TokenError,msg:
_m = ("An unexpected error occurred while tokenizing input\n"
"The following traceback may be corrupted or invalid\n"
"The error message is: %s\n" % msg)
error(_m)
# Join composite names (e.g. "dict.fromkeys")
names = ['.'.join(n) for n in names]
# prune names list of duplicates, but keep the right order
unique_names = uniq_stable(names)
# Start loop over vars
lvals = []
if self.include_vars:
for name_full in unique_names:
name_base = name_full.split('.',1)[0]
if name_base in frame.f_code.co_varnames:
if locals.has_key(name_base):
try:
value = repr(eval(name_full,locals))
except:
value = undefined
else:
value = undefined
name = tpl_local_var % name_full
else:
if frame.f_globals.has_key(name_base):
try:
value = repr(eval(name_full,frame.f_globals))
except:
value = undefined
else:
value = undefined
name = tpl_global_var % name_full
lvals.append(tpl_name_val % (name,value))
if lvals:
lvals = '%s%s' % (indent,em_normal.join(lvals))
else:
lvals = ''
level = '%s %s\n' % (link,call)
if index is None:
frames.append(level)
else:
frames.append('%s%s' % (level,''.join(
_format_traceback_lines(lnum,index,lines,Colors,lvals,
col_scheme))))
# Get (safely) a string form of the exception info
try:
etype_str,evalue_str = map(str,(etype,evalue))
except:
# User exception is improperly defined.
etype,evalue = str,sys.exc_info()[:2]
etype_str,evalue_str = map(str,(etype,evalue))
# ... and format it
exception = ['%s%s%s: %s' % (Colors.excName, etype_str,
ColorsNormal, evalue_str)]
if (not py3compat.PY3) and type(evalue) is types.InstanceType:
try:
names = [w for w in dir(evalue) if isinstance(w, basestring)]
except:
# Every now and then, an object with funny inernals blows up
# when dir() is called on it. We do the best we can to report
# the problem and continue
_m = '%sException reporting error (object with broken dir())%s:'
exception.append(_m % (Colors.excName,ColorsNormal))
etype_str,evalue_str = map(str,sys.exc_info()[:2])
exception.append('%s%s%s: %s' % (Colors.excName,etype_str,
ColorsNormal, evalue_str))
names = []
for name in names:
value = text_repr(getattr(evalue, name))
exception.append('\n%s%s = %s' % (indent, name, value))
# vds: >>
if records:
filepath, lnum = records[-1][1:3]
#print "file:", str(file), "linenb", str(lnum) # dbg
filepath = os.path.abspath(filepath)
ipinst = ipapi.get()
if ipinst is not None:
ipinst.hooks.synchronize_with_editor(filepath, lnum, 0)
# vds: <<
# return all our info assembled as a single string
# return '%s\n\n%s\n%s' % (head,'\n'.join(frames),''.join(exception[0]) )
return [head] + frames + [''.join(exception[0])] |
def debugger(self,force=False):
"""Call up the pdb debugger if desired, always clean up the tb
reference.
Keywords:
- force(False): by default, this routine checks the instance call_pdb
flag and does not actually invoke the debugger if the flag is false.
The 'force' option forces the debugger to activate even if the flag
is false.
If the call_pdb flag is set, the pdb interactive debugger is
invoked. In all cases, the self.tb reference to the current traceback
is deleted to prevent lingering references which hamper memory
management.
Note that each call to pdb() does an 'import readline', so if your app
requires a special setup for the readline completers, you'll have to
fix that by hand after invoking the exception handler."""
if force or self.call_pdb:
if self.pdb is None:
self.pdb = debugger.Pdb(
self.color_scheme_table.active_scheme_name)
# the system displayhook may have changed, restore the original
# for pdb
display_trap = DisplayTrap(hook=sys.__displayhook__)
with display_trap:
self.pdb.reset()
# Find the right frame so we don't pop up inside ipython itself
if hasattr(self,'tb') and self.tb is not None:
etb = self.tb
else:
etb = self.tb = sys.last_traceback
while self.tb is not None and self.tb.tb_next is not None:
self.tb = self.tb.tb_next
if etb and etb.tb_next:
etb = etb.tb_next
self.pdb.botframe = etb.tb_frame
self.pdb.interaction(self.tb.tb_frame, self.tb)
if hasattr(self,'tb'):
del self.tb |
def set_mode(self,mode=None):
"""Switch to the desired mode.
If mode is not specified, cycles through the available modes."""
if not mode:
new_idx = ( self.valid_modes.index(self.mode) + 1 ) % \
len(self.valid_modes)
self.mode = self.valid_modes[new_idx]
elif mode not in self.valid_modes:
raise ValueError, 'Unrecognized mode in FormattedTB: <'+mode+'>\n'\
'Valid modes: '+str(self.valid_modes)
else:
self.mode = mode
# include variable details only in 'Verbose' mode
self.include_vars = (self.mode == self.valid_modes[2])
# Set the join character for generating text tracebacks
self.tb_join_char = self._join_chars[self.mode] |
def group_required(group,
login_url=None,
redirect_field_name=REDIRECT_FIELD_NAME,
skip_superuser=True):
"""
View decorator for requiring a user group.
"""
def decorator(view_func):
@login_required(redirect_field_name=redirect_field_name,
login_url=login_url)
def _wrapped_view(request, *args, **kwargs):
if not (request.user.is_superuser and skip_superuser):
if request.user.groups.filter(name=group).count() == 0:
raise PermissionDenied
return view_func(request, *args, **kwargs)
return _wrapped_view
return decorator |
def get_parent(globals, level):
"""
parent, name = get_parent(globals, level)
Return the package that an import is being performed in. If globals comes
from the module foo.bar.bat (not itself a package), this returns the
sys.modules entry for foo.bar. If globals is from a package's __init__.py,
the package's entry in sys.modules is returned.
If globals doesn't come from a package or a module in a package, or a
corresponding entry is not found in sys.modules, None is returned.
"""
orig_level = level
if not level or not isinstance(globals, dict):
return None, ''
pkgname = globals.get('__package__', None)
if pkgname is not None:
# __package__ is set, so use it
if not hasattr(pkgname, 'rindex'):
raise ValueError('__package__ set to non-string')
if len(pkgname) == 0:
if level > 0:
raise ValueError('Attempted relative import in non-package')
return None, ''
name = pkgname
else:
# __package__ not set, so figure it out and set it
if '__name__' not in globals:
return None, ''
modname = globals['__name__']
if '__path__' in globals:
# __path__ is set, so modname is already the package name
globals['__package__'] = name = modname
else:
# Normal module, so work out the package name if any
lastdot = modname.rfind('.')
if lastdot < 0 and level > 0:
raise ValueError("Attempted relative import in non-package")
if lastdot < 0:
globals['__package__'] = None
return None, ''
globals['__package__'] = name = modname[:lastdot]
dot = len(name)
for x in xrange(level, 1, -1):
try:
dot = name.rindex('.', 0, dot)
except ValueError:
raise ValueError("attempted relative import beyond top-level "
"package")
name = name[:dot]
try:
parent = sys.modules[name]
except:
if orig_level < 1:
warn("Parent module '%.200s' not found while handling absolute "
"import" % name)
parent = None
else:
raise SystemError("Parent module '%.200s' not loaded, cannot "
"perform relative import" % name)
# We expect, but can't guarantee, if parent != None, that:
# - parent.__name__ == name
# - parent.__dict__ is globals
# If this is violated... Who cares?
return parent, name |
def load_next(mod, altmod, name, buf):
"""
mod, name, buf = load_next(mod, altmod, name, buf)
altmod is either None or same as mod
"""
if len(name) == 0:
# completely empty module name should only happen in
# 'from . import' (or '__import__("")')
return mod, None, buf
dot = name.find('.')
if dot == 0:
raise ValueError('Empty module name')
if dot < 0:
subname = name
next = None
else:
subname = name[:dot]
next = name[dot+1:]
if buf != '':
buf += '.'
buf += subname
result = import_submodule(mod, subname, buf)
if result is None and mod != altmod:
result = import_submodule(altmod, subname, subname)
if result is not None:
buf = subname
if result is None:
raise ImportError("No module named %.200s" % name)
return result, next, buf |
def import_submodule(mod, subname, fullname):
"""m = import_submodule(mod, subname, fullname)"""
# Require:
# if mod == None: subname == fullname
# else: mod.__name__ + "." + subname == fullname
global found_now
if fullname in found_now and fullname in sys.modules:
m = sys.modules[fullname]
else:
print 'Reloading', fullname
found_now[fullname] = 1
oldm = sys.modules.get(fullname, None)
if mod is None:
path = None
elif hasattr(mod, '__path__'):
path = mod.__path__
else:
return None
try:
# This appears to be necessary on Python 3, because imp.find_module()
# tries to import standard libraries (like io) itself, and we don't
# want them to be processed by our deep_import_hook.
with replace_import_hook(original_import):
fp, filename, stuff = imp.find_module(subname, path)
except ImportError:
return None
try:
m = imp.load_module(fullname, fp, filename, stuff)
except:
# load_module probably removed name from modules because of
# the error. Put back the original module object.
if oldm:
sys.modules[fullname] = oldm
raise
finally:
if fp: fp.close()
add_submodule(mod, m, fullname, subname)
return m |
def add_submodule(mod, submod, fullname, subname):
"""mod.{subname} = submod"""
if mod is None:
return #Nothing to do here.
if submod is None:
submod = sys.modules[fullname]
setattr(mod, subname, submod)
return |
def ensure_fromlist(mod, fromlist, buf, recursive):
"""Handle 'from module import a, b, c' imports."""
if not hasattr(mod, '__path__'):
return
for item in fromlist:
if not hasattr(item, 'rindex'):
raise TypeError("Item in ``from list'' not a string")
if item == '*':
if recursive:
continue # avoid endless recursion
try:
all = mod.__all__
except AttributeError:
pass
else:
ret = ensure_fromlist(mod, all, buf, 1)
if not ret:
return 0
elif not hasattr(mod, item):
import_submodule(mod, item, buf + '.' + item) |
def deep_import_hook(name, globals=None, locals=None, fromlist=None, level=-1):
"""Replacement for __import__()"""
parent, buf = get_parent(globals, level)
head, name, buf = load_next(parent, None if level < 0 else parent, name, buf)
tail = head
while name:
tail, name, buf = load_next(tail, tail, name, buf)
# If tail is None, both get_parent and load_next found
# an empty module name: someone called __import__("") or
# doctored faulty bytecode
if tail is None:
raise ValueError('Empty module name')
if not fromlist:
return head
ensure_fromlist(tail, fromlist, buf, 0)
return tail |
def deep_reload_hook(m):
"""Replacement for reload()."""
if not isinstance(m, ModuleType):
raise TypeError("reload() argument must be module")
name = m.__name__
if name not in sys.modules:
raise ImportError("reload(): module %.200s not in sys.modules" % name)
global modules_reloading
try:
return modules_reloading[name]
except:
modules_reloading[name] = m
dot = name.rfind('.')
if dot < 0:
subname = name
path = None
else:
try:
parent = sys.modules[name[:dot]]
except KeyError:
modules_reloading.clear()
raise ImportError("reload(): parent %.200s not in sys.modules" % name[:dot])
subname = name[dot+1:]
path = getattr(parent, "__path__", None)
try:
# This appears to be necessary on Python 3, because imp.find_module()
# tries to import standard libraries (like io) itself, and we don't
# want them to be processed by our deep_import_hook.
with replace_import_hook(original_import):
fp, filename, stuff = imp.find_module(subname, path)
finally:
modules_reloading.clear()
try:
newm = imp.load_module(name, fp, filename, stuff)
except:
# load_module probably removed name from modules because of
# the error. Put back the original module object.
sys.modules[name] = m
raise
finally:
if fp: fp.close()
modules_reloading.clear()
return newm |
def reload(module, exclude=['sys', 'os.path', '__builtin__', '__main__']):
"""Recursively reload all modules used in the given module. Optionally
takes a list of modules to exclude from reloading. The default exclude
list contains sys, __main__, and __builtin__, to prevent, e.g., resetting
display, exception, and io hooks.
"""
global found_now
for i in exclude:
found_now[i] = 1
try:
with replace_import_hook(deep_import_hook):
ret = deep_reload_hook(module)
finally:
found_now = {}
return ret |
def code_name(code, number=0):
""" Compute a (probably) unique name for code for caching.
This now expects code to be unicode.
"""
hash_digest = hashlib.md5(code.encode("utf-8")).hexdigest()
# Include the number and 12 characters of the hash in the name. It's
# pretty much impossible that in a single session we'll have collisions
# even with truncated hashes, and the full one makes tracebacks too long
return '<ipython-input-{0}-{1}>'.format(number, hash_digest[:12]) |
def ast_parse(self, source, filename='<unknown>', symbol='exec'):
"""Parse code to an AST with the current compiler flags active.
Arguments are exactly the same as ast.parse (in the standard library),
and are passed to the built-in compile function."""
return compile(source, filename, symbol, self.flags | PyCF_ONLY_AST, 1) |
def cache(self, code, number=0):
"""Make a name for a block of code, and cache the code.
Parameters
----------
code : str
The Python source code to cache.
number : int
A number which forms part of the code's name. Used for the execution
counter.
Returns
-------
The name of the cached code (as a string). Pass this as the filename
argument to compilation, so that tracebacks are correctly hooked up.
"""
name = code_name(code, number)
entry = (len(code), time.time(),
[line+'\n' for line in code.splitlines()], name)
linecache.cache[name] = entry
linecache._ipython_cache[name] = entry
return name |
def check_cache(self, *args):
"""Call linecache.checkcache() safely protecting our cached values.
"""
# First call the orignal checkcache as intended
linecache._checkcache_ori(*args)
# Then, update back the cache with our data, so that tracebacks related
# to our compiled codes can be produced.
linecache.cache.update(linecache._ipython_cache) |
def add_line(self, line):
"""Add a line of source to the code.
Don't include indentations or newlines.
"""
self.code.append(" " * self.indent_amount)
self.code.append(line)
self.code.append("\n") |
def add_section(self):
"""Add a section, a sub-CodeBuilder."""
sect = CodeBuilder(self.indent_amount)
self.code.append(sect)
return sect |
def get_function(self, fn_name):
"""Compile the code, and return the function `fn_name`."""
assert self.indent_amount == 0
g = {}
code_text = str(self)
exec(code_text, g)
return g[fn_name] |
def expr_code(self, expr):
"""Generate a Python expression for `expr`."""
if "|" in expr:
pipes = expr.split("|")
code = self.expr_code(pipes[0])
for func in pipes[1:]:
self.all_vars.add(func)
code = "c_%s(%s)" % (func, code)
elif "." in expr:
dots = expr.split(".")
code = self.expr_code(dots[0])
args = [repr(d) for d in dots[1:]]
code = "dot(%s, %s)" % (code, ", ".join(args))
else:
self.all_vars.add(expr)
code = "c_%s" % expr
return code |
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