INSTRUCTION stringlengths 1 8.43k | RESPONSE stringlengths 75 104k |
|---|---|
sync relevant results from self. client to our results attribute. | def sync_results(f, self, *args, **kwargs):
"""sync relevant results from self.client to our results attribute."""
ret = f(self, *args, **kwargs)
delta = self.outstanding.difference(self.client.outstanding)
completed = self.outstanding.intersection(delta)
self.outstanding = self.outstanding.difference(completed)
return ret |
call spin after the method. | def spin_after(f, self, *args, **kwargs):
"""call spin after the method."""
ret = f(self, *args, **kwargs)
self.spin()
return ret |
Add a new Task Record by msg_id. | def add_record(self, msg_id, rec):
"""Add a new Task Record, by msg_id."""
# print rec
rec = self._binary_buffers(rec)
self._records.insert(rec) |
Get a specific Task Record by msg_id. | def get_record(self, msg_id):
"""Get a specific Task Record, by msg_id."""
r = self._records.find_one({'msg_id': msg_id})
if not r:
# r will be '' if nothing is found
raise KeyError(msg_id)
return r |
Update the data in an existing record. | def update_record(self, msg_id, rec):
"""Update the data in an existing record."""
rec = self._binary_buffers(rec)
self._records.update({'msg_id':msg_id}, {'$set': rec}) |
Find records matching a query dict optionally extracting subset of keys. Returns list of matching records. Parameters ---------- check: dict mongodb - style query argument keys: list of strs [ optional ] if specified the subset of keys to extract. msg_id will * always * be included. | def find_records(self, check, keys=None):
"""Find records matching a query dict, optionally extracting subset of keys.
Returns list of matching records.
Parameters
----------
check: dict
mongodb-style query argument
keys: list of strs [optional]
if specified, the subset of keys to extract. msg_id will *always* be
included.
"""
if keys and 'msg_id' not in keys:
keys.append('msg_id')
matches = list(self._records.find(check,keys))
for rec in matches:
rec.pop('_id')
return matches |
get all msg_ids ordered by time submitted. | def get_history(self):
"""get all msg_ids, ordered by time submitted."""
cursor = self._records.find({},{'msg_id':1}).sort('submitted')
return [ rec['msg_id'] for rec in cursor ] |
Get all messages that are currently ready. | def get_msgs(self):
"""Get all messages that are currently ready."""
msgs = []
while True:
try:
msgs.append(self.get_msg(block=False))
except Empty:
break
return msgs |
Gets a message if there is one that is ready. | def get_msg(self, block=True, timeout=None):
"Gets a message if there is one that is ready."
return self._in_queue.get(block, timeout) |
prop is a sugar for property. | def prop(func=None, *,
field = _UNSET,
get: bool = True, set: bool = True, del_: bool = False,
default = _UNSET,
types: tuple = _UNSET):
'''
`prop` is a sugar for `property`.
``` py
@prop
def value(self):
pass
# equals:
@property
def value(self):
return self._value
@value.setter
def value(self, val):
self._value = val
```
'''
def wrap(func):
if not callable(func):
raise TypeError
prop_name = func.__name__
key = field
if key is _UNSET:
key = '_' + prop_name
fget, fset, fdel = None, None, None
if get:
def fget(self):
try:
return self.__dict__[key]
except KeyError:
if default is not _UNSET:
return default
raise AttributeError(f"'{type(self).__name__}' object has no attribute '{key}'")
if set:
def fset(self, val):
if types is not _UNSET and not isinstance(val, types):
if isinstance(types, tuple):
types_name = tuple(x.__name__ for x in types)
else:
types_name = types.__name__
raise TypeError(f'type of {type(self).__name__}.{prop_name} must be {types_name}; '
f'got {type(val).__name__} instead')
self.__dict__[key] = val
if del_:
def fdel(self):
del self.__dict__[key]
return property(fget, fset, fdel, func.__doc__)
return wrap(func) if func else wrap |
get_onlys is a sugar for multi - property. | def get_onlys(*fields):
'''
`get_onlys` is a sugar for multi-`property`.
``` py
name, age = get_onlys('_name', '_age')
# equals:
@property
def name(self):
return getattr(self, '_name')
@property
def age(self):
return getattr(self, '_age')
```
'''
return tuple(property(lambda self, f=f: getattr(self, f)) for f in fields) |
Parses a database URL. | def parse(url):
"""Parses a database URL."""
config = {}
if not isinstance(url, six.string_types):
url = ''
url = urlparse.urlparse(url)
# Remove query strings.
path = url.path[1:]
path = path.split('?', 2)[0]
# Update with environment configuration.
config.update({
'NAME': path,
'USER': url.username,
'PASSWORD': url.password,
'HOST': url.hostname,
'PORT': url.port,
})
if url.scheme in SCHEMES:
config['ENGINE'] = SCHEMES[url.scheme]
return config |
Return the list containing the names of the modules available in the given folder. | def module_list(path):
"""
Return the list containing the names of the modules available in the given
folder.
"""
# sys.path has the cwd as an empty string, but isdir/listdir need it as '.'
if path == '':
path = '.'
if os.path.isdir(path):
folder_list = os.listdir(path)
elif path.endswith('.egg'):
try:
folder_list = [f for f in zipimporter(path)._files]
except:
folder_list = []
else:
folder_list = []
if not folder_list:
return []
# A few local constants to be used in loops below
isfile = os.path.isfile
pjoin = os.path.join
basename = os.path.basename
def is_importable_file(path):
"""Returns True if the provided path is a valid importable module"""
name, extension = os.path.splitext( path )
return import_re.match(path) and py3compat.isidentifier(name)
# Now find actual path matches for packages or modules
folder_list = [p for p in folder_list
if isfile(pjoin(path, p,'__init__.py'))
or is_importable_file(p) ]
return [basename(p).split('.')[0] for p in folder_list] |
Returns a list containing the names of all the modules available in the folders of the pythonpath. | def get_root_modules():
"""
Returns a list containing the names of all the modules available in the
folders of the pythonpath.
"""
ip = get_ipython()
if 'rootmodules' in ip.db:
return ip.db['rootmodules']
t = time()
store = False
modules = list(sys.builtin_module_names)
for path in sys.path:
modules += module_list(path)
if time() - t >= TIMEOUT_STORAGE and not store:
store = True
print("\nCaching the list of root modules, please wait!")
print("(This will only be done once - type '%rehashx' to "
"reset cache!)\n")
sys.stdout.flush()
if time() - t > TIMEOUT_GIVEUP:
print("This is taking too long, we give up.\n")
ip.db['rootmodules'] = []
return []
modules = set(modules)
if '__init__' in modules:
modules.remove('__init__')
modules = list(modules)
if store:
ip.db['rootmodules'] = modules
return modules |
Easily create a trivial completer for a command. | def quick_completer(cmd, completions):
""" Easily create a trivial completer for a command.
Takes either a list of completions, or all completions in string (that will
be split on whitespace).
Example::
[d:\ipython]|1> import ipy_completers
[d:\ipython]|2> ipy_completers.quick_completer('foo', ['bar','baz'])
[d:\ipython]|3> foo b<TAB>
bar baz
[d:\ipython]|3> foo ba
"""
if isinstance(completions, basestring):
completions = completions.split()
def do_complete(self, event):
return completions
get_ipython().set_hook('complete_command',do_complete, str_key = cmd) |
Returns a list containing the completion possibilities for an import line. | def module_completion(line):
"""
Returns a list containing the completion possibilities for an import line.
The line looks like this :
'import xml.d'
'from xml.dom import'
"""
words = line.split(' ')
nwords = len(words)
# from whatever <tab> -> 'import '
if nwords == 3 and words[0] == 'from':
return ['import ']
# 'from xy<tab>' or 'import xy<tab>'
if nwords < 3 and (words[0] in ['import','from']) :
if nwords == 1:
return get_root_modules()
mod = words[1].split('.')
if len(mod) < 2:
return get_root_modules()
completion_list = try_import('.'.join(mod[:-1]), True)
return ['.'.join(mod[:-1] + [el]) for el in completion_list]
# 'from xyz import abc<tab>'
if nwords >= 3 and words[0] == 'from':
mod = words[1]
return try_import(mod) |
Complete files that end in. py or. ipy for the %run command. | def magic_run_completer(self, event):
"""Complete files that end in .py or .ipy for the %run command.
"""
comps = arg_split(event.line, strict=False)
relpath = (len(comps) > 1 and comps[-1] or '').strip("'\"")
#print("\nev=", event) # dbg
#print("rp=", relpath) # dbg
#print('comps=', comps) # dbg
lglob = glob.glob
isdir = os.path.isdir
relpath, tilde_expand, tilde_val = expand_user(relpath)
dirs = [f.replace('\\','/') + "/" for f in lglob(relpath+'*') if isdir(f)]
# Find if the user has already typed the first filename, after which we
# should complete on all files, since after the first one other files may
# be arguments to the input script.
if filter(magic_run_re.match, comps):
pys = [f.replace('\\','/') for f in lglob('*')]
else:
pys = [f.replace('\\','/')
for f in lglob(relpath+'*.py') + lglob(relpath+'*.ipy') +
lglob(relpath + '*.pyw')]
#print('run comp:', dirs+pys) # dbg
return [compress_user(p, tilde_expand, tilde_val) for p in dirs+pys] |
Completer function for cd which only returns directories. | def cd_completer(self, event):
"""Completer function for cd, which only returns directories."""
ip = get_ipython()
relpath = event.symbol
#print(event) # dbg
if event.line.endswith('-b') or ' -b ' in event.line:
# return only bookmark completions
bkms = self.db.get('bookmarks', None)
if bkms:
return bkms.keys()
else:
return []
if event.symbol == '-':
width_dh = str(len(str(len(ip.user_ns['_dh']) + 1)))
# jump in directory history by number
fmt = '-%0' + width_dh +'d [%s]'
ents = [ fmt % (i,s) for i,s in enumerate(ip.user_ns['_dh'])]
if len(ents) > 1:
return ents
return []
if event.symbol.startswith('--'):
return ["--" + os.path.basename(d) for d in ip.user_ns['_dh']]
# Expand ~ in path and normalize directory separators.
relpath, tilde_expand, tilde_val = expand_user(relpath)
relpath = relpath.replace('\\','/')
found = []
for d in [f.replace('\\','/') + '/' for f in glob.glob(relpath+'*')
if os.path.isdir(f)]:
if ' ' in d:
# we don't want to deal with any of that, complex code
# for this is elsewhere
raise TryNext
found.append(d)
if not found:
if os.path.isdir(relpath):
return [compress_user(relpath, tilde_expand, tilde_val)]
# if no completions so far, try bookmarks
bks = self.db.get('bookmarks',{}).iterkeys()
bkmatches = [s for s in bks if s.startswith(event.symbol)]
if bkmatches:
return bkmatches
raise TryNext
return [compress_user(p, tilde_expand, tilde_val) for p in found] |
This should call display ( Javascript ( jscode )). | def interact(self):
"""This should call display(Javascript(jscode))."""
jscode = self.render()
display(Javascript(data=jscode,lib=self.jslibs)) |
Escape an XML attribute. Value can be unicode. | def _quoteattr(self, attr):
"""Escape an XML attribute. Value can be unicode."""
attr = xml_safe(attr)
if isinstance(attr, unicode) and not UNICODE_STRINGS:
attr = attr.encode(self.encoding)
return saxutils.quoteattr(attr) |
Configures the xunit plugin. | def configure(self, options, config):
"""Configures the xunit plugin."""
Plugin.configure(self, options, config)
self.config = config
if self.enabled:
self.stats = {'errors': 0,
'failures': 0,
'passes': 0,
'skipped': 0
}
self.errorlist = []
self.error_report_file = codecs.open(options.xunit_file, 'w',
self.encoding, 'replace') |
Writes an Xunit - formatted XML file | def report(self, stream):
"""Writes an Xunit-formatted XML file
The file includes a report of test errors and failures.
"""
self.stats['encoding'] = self.encoding
self.stats['total'] = (self.stats['errors'] + self.stats['failures']
+ self.stats['passes'] + self.stats['skipped'])
self.error_report_file.write(
u'<?xml version="1.0" encoding="%(encoding)s"?>'
u'<testsuite name="nosetests" tests="%(total)d" '
u'errors="%(errors)d" failures="%(failures)d" '
u'skip="%(skipped)d">' % self.stats)
self.error_report_file.write(u''.join([self._forceUnicode(e)
for e in self.errorlist]))
self.error_report_file.write(u'</testsuite>')
self.error_report_file.close()
if self.config.verbosity > 1:
stream.writeln("-" * 70)
stream.writeln("XML: %s" % self.error_report_file.name) |
Add error output to Xunit report. | def addError(self, test, err, capt=None):
"""Add error output to Xunit report.
"""
taken = self._timeTaken()
if issubclass(err[0], SkipTest):
type = 'skipped'
self.stats['skipped'] += 1
else:
type = 'error'
self.stats['errors'] += 1
tb = ''.join(traceback.format_exception(*err))
id = test.id()
self.errorlist.append(
'<testcase classname=%(cls)s name=%(name)s time="%(taken).3f">'
'<%(type)s type=%(errtype)s message=%(message)s><![CDATA[%(tb)s]]>'
'</%(type)s></testcase>' %
{'cls': self._quoteattr(id_split(id)[0]),
'name': self._quoteattr(id_split(id)[-1]),
'taken': taken,
'type': type,
'errtype': self._quoteattr(nice_classname(err[0])),
'message': self._quoteattr(exc_message(err)),
'tb': escape_cdata(tb),
}) |
Add failure output to Xunit report. | def addFailure(self, test, err, capt=None, tb_info=None):
"""Add failure output to Xunit report.
"""
taken = self._timeTaken()
tb = ''.join(traceback.format_exception(*err))
self.stats['failures'] += 1
id = test.id()
self.errorlist.append(
'<testcase classname=%(cls)s name=%(name)s time="%(taken).3f">'
'<failure type=%(errtype)s message=%(message)s><![CDATA[%(tb)s]]>'
'</failure></testcase>' %
{'cls': self._quoteattr(id_split(id)[0]),
'name': self._quoteattr(id_split(id)[-1]),
'taken': taken,
'errtype': self._quoteattr(nice_classname(err[0])),
'message': self._quoteattr(exc_message(err)),
'tb': escape_cdata(tb),
}) |
Add success output to Xunit report. | def addSuccess(self, test, capt=None):
"""Add success output to Xunit report.
"""
taken = self._timeTaken()
self.stats['passes'] += 1
id = test.id()
self.errorlist.append(
'<testcase classname=%(cls)s name=%(name)s '
'time="%(taken).3f" />' %
{'cls': self._quoteattr(id_split(id)[0]),
'name': self._quoteattr(id_split(id)[-1]),
'taken': taken,
}) |
Pick two at random use the LRU of the two. | def twobin(loads):
"""Pick two at random, use the LRU of the two.
The content of loads is ignored.
Assumes LRU ordering of loads, with oldest first.
"""
n = len(loads)
a = randint(0,n-1)
b = randint(0,n-1)
return min(a,b) |
Pick two at random using inverse load as weight. | def weighted(loads):
"""Pick two at random using inverse load as weight.
Return the less loaded of the two.
"""
# weight 0 a million times more than 1:
weights = 1./(1e-6+numpy.array(loads))
sums = weights.cumsum()
t = sums[-1]
x = random()*t
y = random()*t
idx = 0
idy = 0
while sums[idx] < x:
idx += 1
while sums[idy] < y:
idy += 1
if weights[idy] > weights[idx]:
return idy
else:
return idx |
dispatch register/ unregister events. | def dispatch_notification(self, msg):
"""dispatch register/unregister events."""
try:
idents,msg = self.session.feed_identities(msg)
except ValueError:
self.log.warn("task::Invalid Message: %r",msg)
return
try:
msg = self.session.unserialize(msg)
except ValueError:
self.log.warn("task::Unauthorized message from: %r"%idents)
return
msg_type = msg['header']['msg_type']
handler = self._notification_handlers.get(msg_type, None)
if handler is None:
self.log.error("Unhandled message type: %r"%msg_type)
else:
try:
handler(cast_bytes(msg['content']['queue']))
except Exception:
self.log.error("task::Invalid notification msg: %r", msg, exc_info=True) |
New engine with ident uid became available. | def _register_engine(self, uid):
"""New engine with ident `uid` became available."""
# head of the line:
self.targets.insert(0,uid)
self.loads.insert(0,0)
# initialize sets
self.completed[uid] = set()
self.failed[uid] = set()
self.pending[uid] = {}
# rescan the graph:
self.update_graph(None) |
Existing engine with ident uid became unavailable. | def _unregister_engine(self, uid):
"""Existing engine with ident `uid` became unavailable."""
if len(self.targets) == 1:
# this was our only engine
pass
# handle any potentially finished tasks:
self.engine_stream.flush()
# don't pop destinations, because they might be used later
# map(self.destinations.pop, self.completed.pop(uid))
# map(self.destinations.pop, self.failed.pop(uid))
# prevent this engine from receiving work
idx = self.targets.index(uid)
self.targets.pop(idx)
self.loads.pop(idx)
# wait 5 seconds before cleaning up pending jobs, since the results might
# still be incoming
if self.pending[uid]:
dc = ioloop.DelayedCallback(lambda : self.handle_stranded_tasks(uid), 5000, self.loop)
dc.start()
else:
self.completed.pop(uid)
self.failed.pop(uid) |
Deal with jobs resident in an engine that died. | def handle_stranded_tasks(self, engine):
"""Deal with jobs resident in an engine that died."""
lost = self.pending[engine]
for msg_id in lost.keys():
if msg_id not in self.pending[engine]:
# prevent double-handling of messages
continue
raw_msg = lost[msg_id].raw_msg
idents,msg = self.session.feed_identities(raw_msg, copy=False)
parent = self.session.unpack(msg[1].bytes)
idents = [engine, idents[0]]
# build fake error reply
try:
raise error.EngineError("Engine %r died while running task %r"%(engine, msg_id))
except:
content = error.wrap_exception()
# build fake header
header = dict(
status='error',
engine=engine,
date=datetime.now(),
)
msg = self.session.msg('apply_reply', content, parent=parent, subheader=header)
raw_reply = map(zmq.Message, self.session.serialize(msg, ident=idents))
# and dispatch it
self.dispatch_result(raw_reply)
# finally scrub completed/failed lists
self.completed.pop(engine)
self.failed.pop(engine) |
Dispatch job submission to appropriate handlers. | def dispatch_submission(self, raw_msg):
"""Dispatch job submission to appropriate handlers."""
# ensure targets up to date:
self.notifier_stream.flush()
try:
idents, msg = self.session.feed_identities(raw_msg, copy=False)
msg = self.session.unserialize(msg, content=False, copy=False)
except Exception:
self.log.error("task::Invaid task msg: %r"%raw_msg, exc_info=True)
return
# send to monitor
self.mon_stream.send_multipart([b'intask']+raw_msg, copy=False)
header = msg['header']
msg_id = header['msg_id']
self.all_ids.add(msg_id)
# get targets as a set of bytes objects
# from a list of unicode objects
targets = header.get('targets', [])
targets = map(cast_bytes, targets)
targets = set(targets)
retries = header.get('retries', 0)
self.retries[msg_id] = retries
# time dependencies
after = header.get('after', None)
if after:
after = Dependency(after)
if after.all:
if after.success:
after = Dependency(after.difference(self.all_completed),
success=after.success,
failure=after.failure,
all=after.all,
)
if after.failure:
after = Dependency(after.difference(self.all_failed),
success=after.success,
failure=after.failure,
all=after.all,
)
if after.check(self.all_completed, self.all_failed):
# recast as empty set, if `after` already met,
# to prevent unnecessary set comparisons
after = MET
else:
after = MET
# location dependencies
follow = Dependency(header.get('follow', []))
# turn timeouts into datetime objects:
timeout = header.get('timeout', None)
if timeout:
# cast to float, because jsonlib returns floats as decimal.Decimal,
# which timedelta does not accept
timeout = datetime.now() + timedelta(0,float(timeout),0)
job = Job(msg_id=msg_id, raw_msg=raw_msg, idents=idents, msg=msg,
header=header, targets=targets, after=after, follow=follow,
timeout=timeout,
)
# validate and reduce dependencies:
for dep in after,follow:
if not dep: # empty dependency
continue
# check valid:
if msg_id in dep or dep.difference(self.all_ids):
self.depending[msg_id] = job
return self.fail_unreachable(msg_id, error.InvalidDependency)
# check if unreachable:
if dep.unreachable(self.all_completed, self.all_failed):
self.depending[msg_id] = job
return self.fail_unreachable(msg_id)
if after.check(self.all_completed, self.all_failed):
# time deps already met, try to run
if not self.maybe_run(job):
# can't run yet
if msg_id not in self.all_failed:
# could have failed as unreachable
self.save_unmet(job)
else:
self.save_unmet(job) |
Audit all waiting tasks for expired timeouts. | def audit_timeouts(self):
"""Audit all waiting tasks for expired timeouts."""
now = datetime.now()
for msg_id in self.depending.keys():
# must recheck, in case one failure cascaded to another:
if msg_id in self.depending:
job = self.depending[msg_id]
if job.timeout and job.timeout < now:
self.fail_unreachable(msg_id, error.TaskTimeout) |
a task has become unreachable send a reply with an ImpossibleDependency error. | def fail_unreachable(self, msg_id, why=error.ImpossibleDependency):
"""a task has become unreachable, send a reply with an ImpossibleDependency
error."""
if msg_id not in self.depending:
self.log.error("msg %r already failed!", msg_id)
return
job = self.depending.pop(msg_id)
for mid in job.dependents:
if mid in self.graph:
self.graph[mid].remove(msg_id)
try:
raise why()
except:
content = error.wrap_exception()
self.all_done.add(msg_id)
self.all_failed.add(msg_id)
msg = self.session.send(self.client_stream, 'apply_reply', content,
parent=job.header, ident=job.idents)
self.session.send(self.mon_stream, msg, ident=[b'outtask']+job.idents)
self.update_graph(msg_id, success=False) |
check location dependencies and run if they are met. | def maybe_run(self, job):
"""check location dependencies, and run if they are met."""
msg_id = job.msg_id
self.log.debug("Attempting to assign task %s", msg_id)
if not self.targets:
# no engines, definitely can't run
return False
if job.follow or job.targets or job.blacklist or self.hwm:
# we need a can_run filter
def can_run(idx):
# check hwm
if self.hwm and self.loads[idx] == self.hwm:
return False
target = self.targets[idx]
# check blacklist
if target in job.blacklist:
return False
# check targets
if job.targets and target not in job.targets:
return False
# check follow
return job.follow.check(self.completed[target], self.failed[target])
indices = filter(can_run, range(len(self.targets)))
if not indices:
# couldn't run
if job.follow.all:
# check follow for impossibility
dests = set()
relevant = set()
if job.follow.success:
relevant = self.all_completed
if job.follow.failure:
relevant = relevant.union(self.all_failed)
for m in job.follow.intersection(relevant):
dests.add(self.destinations[m])
if len(dests) > 1:
self.depending[msg_id] = job
self.fail_unreachable(msg_id)
return False
if job.targets:
# check blacklist+targets for impossibility
job.targets.difference_update(job.blacklist)
if not job.targets or not job.targets.intersection(self.targets):
self.depending[msg_id] = job
self.fail_unreachable(msg_id)
return False
return False
else:
indices = None
self.submit_task(job, indices)
return True |
Save a message for later submission when its dependencies are met. | def save_unmet(self, job):
"""Save a message for later submission when its dependencies are met."""
msg_id = job.msg_id
self.depending[msg_id] = job
# track the ids in follow or after, but not those already finished
for dep_id in job.after.union(job.follow).difference(self.all_done):
if dep_id not in self.graph:
self.graph[dep_id] = set()
self.graph[dep_id].add(msg_id) |
Submit a task to any of a subset of our targets. | def submit_task(self, job, indices=None):
"""Submit a task to any of a subset of our targets."""
if indices:
loads = [self.loads[i] for i in indices]
else:
loads = self.loads
idx = self.scheme(loads)
if indices:
idx = indices[idx]
target = self.targets[idx]
# print (target, map(str, msg[:3]))
# send job to the engine
self.engine_stream.send(target, flags=zmq.SNDMORE, copy=False)
self.engine_stream.send_multipart(job.raw_msg, copy=False)
# update load
self.add_job(idx)
self.pending[target][job.msg_id] = job
# notify Hub
content = dict(msg_id=job.msg_id, engine_id=target.decode('ascii'))
self.session.send(self.mon_stream, 'task_destination', content=content,
ident=[b'tracktask',self.ident]) |
dispatch method for result replies | def dispatch_result(self, raw_msg):
"""dispatch method for result replies"""
try:
idents,msg = self.session.feed_identities(raw_msg, copy=False)
msg = self.session.unserialize(msg, content=False, copy=False)
engine = idents[0]
try:
idx = self.targets.index(engine)
except ValueError:
pass # skip load-update for dead engines
else:
self.finish_job(idx)
except Exception:
self.log.error("task::Invaid result: %r", raw_msg, exc_info=True)
return
header = msg['header']
parent = msg['parent_header']
if header.get('dependencies_met', True):
success = (header['status'] == 'ok')
msg_id = parent['msg_id']
retries = self.retries[msg_id]
if not success and retries > 0:
# failed
self.retries[msg_id] = retries - 1
self.handle_unmet_dependency(idents, parent)
else:
del self.retries[msg_id]
# relay to client and update graph
self.handle_result(idents, parent, raw_msg, success)
# send to Hub monitor
self.mon_stream.send_multipart([b'outtask']+raw_msg, copy=False)
else:
self.handle_unmet_dependency(idents, parent) |
handle a real task result either success or failure | def handle_result(self, idents, parent, raw_msg, success=True):
"""handle a real task result, either success or failure"""
# first, relay result to client
engine = idents[0]
client = idents[1]
# swap_ids for ROUTER-ROUTER mirror
raw_msg[:2] = [client,engine]
# print (map(str, raw_msg[:4]))
self.client_stream.send_multipart(raw_msg, copy=False)
# now, update our data structures
msg_id = parent['msg_id']
self.pending[engine].pop(msg_id)
if success:
self.completed[engine].add(msg_id)
self.all_completed.add(msg_id)
else:
self.failed[engine].add(msg_id)
self.all_failed.add(msg_id)
self.all_done.add(msg_id)
self.destinations[msg_id] = engine
self.update_graph(msg_id, success) |
handle an unmet dependency | def handle_unmet_dependency(self, idents, parent):
"""handle an unmet dependency"""
engine = idents[0]
msg_id = parent['msg_id']
job = self.pending[engine].pop(msg_id)
job.blacklist.add(engine)
if job.blacklist == job.targets:
self.depending[msg_id] = job
self.fail_unreachable(msg_id)
elif not self.maybe_run(job):
# resubmit failed
if msg_id not in self.all_failed:
# put it back in our dependency tree
self.save_unmet(job)
if self.hwm:
try:
idx = self.targets.index(engine)
except ValueError:
pass # skip load-update for dead engines
else:
if self.loads[idx] == self.hwm-1:
self.update_graph(None) |
dep_id just finished. Update our dependency graph and submit any jobs that just became runable. | def update_graph(self, dep_id=None, success=True):
"""dep_id just finished. Update our dependency
graph and submit any jobs that just became runable.
Called with dep_id=None to update entire graph for hwm, but without finishing
a task.
"""
# print ("\n\n***********")
# pprint (dep_id)
# pprint (self.graph)
# pprint (self.depending)
# pprint (self.all_completed)
# pprint (self.all_failed)
# print ("\n\n***********\n\n")
# update any jobs that depended on the dependency
jobs = self.graph.pop(dep_id, [])
# recheck *all* jobs if
# a) we have HWM and an engine just become no longer full
# or b) dep_id was given as None
if dep_id is None or self.hwm and any( [ load==self.hwm-1 for load in self.loads ]):
jobs = self.depending.keys()
for msg_id in sorted(jobs, key=lambda msg_id: self.depending[msg_id].timestamp):
job = self.depending[msg_id]
if job.after.unreachable(self.all_completed, self.all_failed)\
or job.follow.unreachable(self.all_completed, self.all_failed):
self.fail_unreachable(msg_id)
elif job.after.check(self.all_completed, self.all_failed): # time deps met, maybe run
if self.maybe_run(job):
self.depending.pop(msg_id)
for mid in job.dependents:
if mid in self.graph:
self.graph[mid].remove(msg_id) |
Called after self. targets [ idx ] just got the job with header. Override with subclasses. The default ordering is simple LRU. The default loads are the number of outstanding jobs. | def add_job(self, idx):
"""Called after self.targets[idx] just got the job with header.
Override with subclasses. The default ordering is simple LRU.
The default loads are the number of outstanding jobs."""
self.loads[idx] += 1
for lis in (self.targets, self.loads):
lis.append(lis.pop(idx)) |
Generate a new log - file with a default header. | def logstart(self, logfname=None, loghead=None, logmode=None,
log_output=False, timestamp=False, log_raw_input=False):
"""Generate a new log-file with a default header.
Raises RuntimeError if the log has already been started"""
if self.logfile is not None:
raise RuntimeError('Log file is already active: %s' %
self.logfname)
# The parameters can override constructor defaults
if logfname is not None: self.logfname = logfname
if loghead is not None: self.loghead = loghead
if logmode is not None: self.logmode = logmode
# Parameters not part of the constructor
self.timestamp = timestamp
self.log_output = log_output
self.log_raw_input = log_raw_input
# init depending on the log mode requested
isfile = os.path.isfile
logmode = self.logmode
if logmode == 'append':
self.logfile = io.open(self.logfname, 'a', encoding='utf-8')
elif logmode == 'backup':
if isfile(self.logfname):
backup_logname = self.logfname+'~'
# Manually remove any old backup, since os.rename may fail
# under Windows.
if isfile(backup_logname):
os.remove(backup_logname)
os.rename(self.logfname,backup_logname)
self.logfile = io.open(self.logfname, 'w', encoding='utf-8')
elif logmode == 'global':
self.logfname = os.path.join(self.home_dir,self.logfname)
self.logfile = io.open(self.logfname, 'a', encoding='utf-8')
elif logmode == 'over':
if isfile(self.logfname):
os.remove(self.logfname)
self.logfile = io.open(self.logfname,'w', encoding='utf-8')
elif logmode == 'rotate':
if isfile(self.logfname):
if isfile(self.logfname+'.001~'):
old = glob.glob(self.logfname+'.*~')
old.sort()
old.reverse()
for f in old:
root, ext = os.path.splitext(f)
num = int(ext[1:-1])+1
os.rename(f, root+'.'+`num`.zfill(3)+'~')
os.rename(self.logfname, self.logfname+'.001~')
self.logfile = io.open(self.logfname, 'w', encoding='utf-8')
if logmode != 'append':
self.logfile.write(self.loghead)
self.logfile.flush()
self.log_active = True |
Switch logging on/ off. val should be ONLY a boolean. | def switch_log(self,val):
"""Switch logging on/off. val should be ONLY a boolean."""
if val not in [False,True,0,1]:
raise ValueError, \
'Call switch_log ONLY with a boolean argument, not with:',val
label = {0:'OFF',1:'ON',False:'OFF',True:'ON'}
if self.logfile is None:
print """
Logging hasn't been started yet (use logstart for that).
%logon/%logoff are for temporarily starting and stopping logging for a logfile
which already exists. But you must first start the logging process with
%logstart (optionally giving a logfile name)."""
else:
if self.log_active == val:
print 'Logging is already',label[val]
else:
print 'Switching logging',label[val]
self.log_active = not self.log_active
self.log_active_out = self.log_active |
Print a status message about the logger. | def logstate(self):
"""Print a status message about the logger."""
if self.logfile is None:
print 'Logging has not been activated.'
else:
state = self.log_active and 'active' or 'temporarily suspended'
print 'Filename :',self.logfname
print 'Mode :',self.logmode
print 'Output logging :',self.log_output
print 'Raw input log :',self.log_raw_input
print 'Timestamping :',self.timestamp
print 'State :',state |
Write the sources to a log. | def log(self, line_mod, line_ori):
"""Write the sources to a log.
Inputs:
- line_mod: possibly modified input, such as the transformations made
by input prefilters or input handlers of various kinds. This should
always be valid Python.
- line_ori: unmodified input line from the user. This is not
necessarily valid Python.
"""
# Write the log line, but decide which one according to the
# log_raw_input flag, set when the log is started.
if self.log_raw_input:
self.log_write(line_ori)
else:
self.log_write(line_mod) |
Write data to the log file if active | def log_write(self, data, kind='input'):
"""Write data to the log file, if active"""
#print 'data: %r' % data # dbg
if self.log_active and data:
write = self.logfile.write
if kind=='input':
if self.timestamp:
write(str_to_unicode(time.strftime('# %a, %d %b %Y %H:%M:%S\n',
time.localtime())))
write(data)
elif kind=='output' and self.log_output:
odata = u'\n'.join([u'#[Out]# %s' % s
for s in data.splitlines()])
write(u'%s\n' % odata)
self.logfile.flush() |
Fully stop logging and close log file. | def logstop(self):
"""Fully stop logging and close log file.
In order to start logging again, a new logstart() call needs to be
made, possibly (though not necessarily) with a new filename, mode and
other options."""
if self.logfile is not None:
self.logfile.close()
self.logfile = None
else:
print "Logging hadn't been started."
self.log_active = False |
Create a worksheet by name with with a list of cells. | def new_worksheet(name=None, cells=None):
"""Create a worksheet by name with with a list of cells."""
ws = NotebookNode()
if name is not None:
ws.name = unicode(name)
if cells is None:
ws.cells = []
else:
ws.cells = list(cells)
return ws |
Create a notebook by name id and a list of worksheets. | def new_notebook(metadata=None, worksheets=None):
"""Create a notebook by name, id and a list of worksheets."""
nb = NotebookNode()
nb.nbformat = 2
if worksheets is None:
nb.worksheets = []
else:
nb.worksheets = list(worksheets)
if metadata is None:
nb.metadata = new_metadata()
else:
nb.metadata = NotebookNode(metadata)
return nb |
Adds a target string for dispatching | def add_s(self, s, obj, priority= 0 ):
""" Adds a target 'string' for dispatching """
chain = self.strs.get(s, CommandChainDispatcher())
chain.add(obj,priority)
self.strs[s] = chain |
Adds a target regexp for dispatching | def add_re(self, regex, obj, priority= 0 ):
""" Adds a target regexp for dispatching """
chain = self.regexs.get(regex, CommandChainDispatcher())
chain.add(obj,priority)
self.regexs[regex] = chain |
Get a seq of Commandchain objects that match key | def dispatch(self, key):
""" Get a seq of Commandchain objects that match key """
if key in self.strs:
yield self.strs[key]
for r, obj in self.regexs.items():
if re.match(r, key):
yield obj
else:
#print "nomatch",key # dbg
pass |
Yield all value targets without priority | def flat_matches(self, key):
""" Yield all 'value' targets, without priority """
for val in self.dispatch(key):
for el in val:
yield el[1] # only value, no priority
return |
do a bit of validation of the notebook dir | def _notebook_dir_changed(self, name, old, new):
"""do a bit of validation of the notebook dir"""
if os.path.exists(new) and not os.path.isdir(new):
raise TraitError("notebook dir %r is not a directory" % new)
if not os.path.exists(new):
self.log.info("Creating notebook dir %s", new)
try:
os.mkdir(new)
except:
raise TraitError("Couldn't create notebook dir %r" % new) |
List all notebooks in the notebook dir. | def list_notebooks(self):
"""List all notebooks in the notebook dir.
This returns a list of dicts of the form::
dict(notebook_id=notebook,name=name)
"""
names = glob.glob(os.path.join(self.notebook_dir,
'*' + self.filename_ext))
names = [os.path.splitext(os.path.basename(name))[0]
for name in names]
data = []
for name in names:
if name not in self.rev_mapping:
notebook_id = self.new_notebook_id(name)
else:
notebook_id = self.rev_mapping[name]
data.append(dict(notebook_id=notebook_id,name=name))
data = sorted(data, key=lambda item: item['name'])
return data |
Generate a new notebook_id for a name and store its mappings. | def new_notebook_id(self, name):
"""Generate a new notebook_id for a name and store its mappings."""
# TODO: the following will give stable urls for notebooks, but unless
# the notebooks are immediately redirected to their new urls when their
# filemname changes, nasty inconsistencies result. So for now it's
# disabled and instead we use a random uuid4() call. But we leave the
# logic here so that we can later reactivate it, whhen the necessary
# url redirection code is written.
#notebook_id = unicode(uuid.uuid5(uuid.NAMESPACE_URL,
# 'file://'+self.get_path_by_name(name).encode('utf-8')))
notebook_id = unicode(uuid.uuid4())
self.mapping[notebook_id] = name
self.rev_mapping[name] = notebook_id
return notebook_id |
Delete a notebook s id only. This doesn t delete the actual notebook. | def delete_notebook_id(self, notebook_id):
"""Delete a notebook's id only. This doesn't delete the actual notebook."""
name = self.mapping[notebook_id]
del self.mapping[notebook_id]
del self.rev_mapping[name] |
Does a notebook exist? | def notebook_exists(self, notebook_id):
"""Does a notebook exist?"""
if notebook_id not in self.mapping:
return False
path = self.get_path_by_name(self.mapping[notebook_id])
return os.path.isfile(path) |
Return a full path to a notebook given its notebook_id. | def find_path(self, notebook_id):
"""Return a full path to a notebook given its notebook_id."""
try:
name = self.mapping[notebook_id]
except KeyError:
raise web.HTTPError(404, u'Notebook does not exist: %s' % notebook_id)
return self.get_path_by_name(name) |
Return a full path to a notebook given its name. | def get_path_by_name(self, name):
"""Return a full path to a notebook given its name."""
filename = name + self.filename_ext
path = os.path.join(self.notebook_dir, filename)
return path |
Get the representation of a notebook in format by notebook_id. | def get_notebook(self, notebook_id, format=u'json'):
"""Get the representation of a notebook in format by notebook_id."""
format = unicode(format)
if format not in self.allowed_formats:
raise web.HTTPError(415, u'Invalid notebook format: %s' % format)
last_modified, nb = self.get_notebook_object(notebook_id)
kwargs = {}
if format == 'json':
# don't split lines for sending over the wire, because it
# should match the Python in-memory format.
kwargs['split_lines'] = False
data = current.writes(nb, format, **kwargs)
name = nb.metadata.get('name','notebook')
return last_modified, name, data |
Get the NotebookNode representation of a notebook by notebook_id. | def get_notebook_object(self, notebook_id):
"""Get the NotebookNode representation of a notebook by notebook_id."""
path = self.find_path(notebook_id)
if not os.path.isfile(path):
raise web.HTTPError(404, u'Notebook does not exist: %s' % notebook_id)
info = os.stat(path)
last_modified = datetime.datetime.utcfromtimestamp(info.st_mtime)
with open(path,'r') as f:
s = f.read()
try:
# v1 and v2 and json in the .ipynb files.
nb = current.reads(s, u'json')
except:
raise web.HTTPError(500, u'Unreadable JSON notebook.')
# Always use the filename as the notebook name.
nb.metadata.name = os.path.splitext(os.path.basename(path))[0]
return last_modified, nb |
Save a new notebook and return its notebook_id. | def save_new_notebook(self, data, name=None, format=u'json'):
"""Save a new notebook and return its notebook_id.
If a name is passed in, it overrides any values in the notebook data
and the value in the data is updated to use that value.
"""
if format not in self.allowed_formats:
raise web.HTTPError(415, u'Invalid notebook format: %s' % format)
try:
nb = current.reads(data.decode('utf-8'), format)
except:
raise web.HTTPError(400, u'Invalid JSON data')
if name is None:
try:
name = nb.metadata.name
except AttributeError:
raise web.HTTPError(400, u'Missing notebook name')
nb.metadata.name = name
notebook_id = self.new_notebook_id(name)
self.save_notebook_object(notebook_id, nb)
return notebook_id |
Save an existing notebook by notebook_id. | def save_notebook(self, notebook_id, data, name=None, format=u'json'):
"""Save an existing notebook by notebook_id."""
if format not in self.allowed_formats:
raise web.HTTPError(415, u'Invalid notebook format: %s' % format)
try:
nb = current.reads(data.decode('utf-8'), format)
except:
raise web.HTTPError(400, u'Invalid JSON data')
if name is not None:
nb.metadata.name = name
self.save_notebook_object(notebook_id, nb) |
Save an existing notebook object by notebook_id. | def save_notebook_object(self, notebook_id, nb):
"""Save an existing notebook object by notebook_id."""
if notebook_id not in self.mapping:
raise web.HTTPError(404, u'Notebook does not exist: %s' % notebook_id)
old_name = self.mapping[notebook_id]
try:
new_name = nb.metadata.name
except AttributeError:
raise web.HTTPError(400, u'Missing notebook name')
path = self.get_path_by_name(new_name)
try:
with open(path,'w') as f:
current.write(nb, f, u'json')
except Exception as e:
raise web.HTTPError(400, u'Unexpected error while saving notebook: %s' % e)
# save .py script as well
if self.save_script:
pypath = os.path.splitext(path)[0] + '.py'
try:
with io.open(pypath,'w', encoding='utf-8') as f:
current.write(nb, f, u'py')
except Exception as e:
raise web.HTTPError(400, u'Unexpected error while saving notebook as script: %s' % e)
if old_name != new_name:
old_path = self.get_path_by_name(old_name)
if os.path.isfile(old_path):
os.unlink(old_path)
if self.save_script:
old_pypath = os.path.splitext(old_path)[0] + '.py'
if os.path.isfile(old_pypath):
os.unlink(old_pypath)
self.mapping[notebook_id] = new_name
self.rev_mapping[new_name] = notebook_id
del self.rev_mapping[old_name] |
Delete notebook by notebook_id. | def delete_notebook(self, notebook_id):
"""Delete notebook by notebook_id."""
path = self.find_path(notebook_id)
if not os.path.isfile(path):
raise web.HTTPError(404, u'Notebook does not exist: %s' % notebook_id)
os.unlink(path)
self.delete_notebook_id(notebook_id) |
Return a non - used filename of the form basename<int >. This searches through the filenames ( basename0 basename1... ) until is find one that is not already being used. It is used to create Untitled and Copy names that are unique. | def increment_filename(self, basename):
"""Return a non-used filename of the form basename<int>.
This searches through the filenames (basename0, basename1, ...)
until is find one that is not already being used. It is used to
create Untitled and Copy names that are unique.
"""
i = 0
while True:
name = u'%s%i' % (basename,i)
path = self.get_path_by_name(name)
if not os.path.isfile(path):
break
else:
i = i+1
return path, name |
Create a new notebook and return its notebook_id. | def new_notebook(self):
"""Create a new notebook and return its notebook_id."""
path, name = self.increment_filename('Untitled')
notebook_id = self.new_notebook_id(name)
metadata = current.new_metadata(name=name)
nb = current.new_notebook(metadata=metadata)
with open(path,'w') as f:
current.write(nb, f, u'json')
return notebook_id |
Copy an existing notebook and return its notebook_id. | def copy_notebook(self, notebook_id):
"""Copy an existing notebook and return its notebook_id."""
last_mod, nb = self.get_notebook_object(notebook_id)
name = nb.metadata.name + '-Copy'
path, name = self.increment_filename(name)
nb.metadata.name = name
notebook_id = self.new_notebook_id(name)
self.save_notebook_object(notebook_id, nb)
return notebook_id |
Return all physical tokens even line continuations. | def phys_tokens(toks):
"""Return all physical tokens, even line continuations.
tokenize.generate_tokens() doesn't return a token for the backslash that
continues lines. This wrapper provides those tokens so that we can
re-create a faithful representation of the original source.
Returns the same values as generate_tokens()
"""
last_line = None
last_lineno = -1
last_ttype = None
for ttype, ttext, (slineno, scol), (elineno, ecol), ltext in toks:
if last_lineno != elineno:
if last_line and last_line.endswith("\\\n"):
# We are at the beginning of a new line, and the last line
# ended with a backslash. We probably have to inject a
# backslash token into the stream. Unfortunately, there's more
# to figure out. This code::
#
# usage = """\
# HEY THERE
# """
#
# triggers this condition, but the token text is::
#
# '"""\\\nHEY THERE\n"""'
#
# so we need to figure out if the backslash is already in the
# string token or not.
inject_backslash = True
if last_ttype == tokenize.COMMENT:
# Comments like this \
# should never result in a new token.
inject_backslash = False
elif ttype == token.STRING:
if "\n" in ttext and ttext.split('\n', 1)[0][-1] == '\\':
# It's a multiline string and the first line ends with
# a backslash, so we don't need to inject another.
inject_backslash = False
if inject_backslash:
# Figure out what column the backslash is in.
ccol = len(last_line.split("\n")[-2]) - 1
# Yield the token, with a fake token type.
yield (
99999, "\\\n",
(slineno, ccol), (slineno, ccol+2),
last_line
)
last_line = ltext
last_ttype = ttype
yield ttype, ttext, (slineno, scol), (elineno, ecol), ltext
last_lineno = elineno |
Generate a series of lines one for each line in source. | def source_token_lines(source):
"""Generate a series of lines, one for each line in `source`.
Each line is a list of pairs, each pair is a token::
[('key', 'def'), ('ws', ' '), ('nam', 'hello'), ('op', '('), ... ]
Each pair has a token class, and the token text.
If you concatenate all the token texts, and then join them with newlines,
you should have your original `source` back, with two differences:
trailing whitespace is not preserved, and a final line with no newline
is indistinguishable from a final line with a newline.
"""
ws_tokens = set([token.INDENT, token.DEDENT, token.NEWLINE, tokenize.NL])
line = []
col = 0
source = source.expandtabs(8).replace('\r\n', '\n')
tokgen = generate_tokens(source)
for ttype, ttext, (_, scol), (_, ecol), _ in phys_tokens(tokgen):
mark_start = True
for part in re.split('(\n)', ttext):
if part == '\n':
yield line
line = []
col = 0
mark_end = False
elif part == '':
mark_end = False
elif ttype in ws_tokens:
mark_end = False
else:
if mark_start and scol > col:
line.append(("ws", " " * (scol - col)))
mark_start = False
tok_class = tokenize.tok_name.get(ttype, 'xx').lower()[:3]
if ttype == token.NAME and keyword.iskeyword(ttext):
tok_class = "key"
line.append((tok_class, part))
mark_end = True
scol = 0
if mark_end:
col = ecol
if line:
yield line |
Determine the encoding for source ( a string ) according to PEP 263. | def source_encoding(source):
"""Determine the encoding for `source` (a string), according to PEP 263.
Returns a string, the name of the encoding.
"""
# Note: this function should never be called on Python 3, since py3 has
# built-in tools to do this.
assert sys.version_info < (3, 0)
# This is mostly code adapted from Py3.2's tokenize module.
cookie_re = re.compile(r"coding[:=]\s*([-\w.]+)")
# Do this so the detect_encode code we copied will work.
readline = iter(source.splitlines(True)).next
def _get_normal_name(orig_enc):
"""Imitates get_normal_name in tokenizer.c."""
# Only care about the first 12 characters.
enc = orig_enc[:12].lower().replace("_", "-")
if re.match(r"^utf-8($|-)", enc):
return "utf-8"
if re.match(r"^(latin-1|iso-8859-1|iso-latin-1)($|-)", enc):
return "iso-8859-1"
return orig_enc
# From detect_encode():
# It detects the encoding from the presence of a utf-8 bom or an encoding
# cookie as specified in pep-0263. If both a bom and a cookie are present,
# but disagree, a SyntaxError will be raised. If the encoding cookie is an
# invalid charset, raise a SyntaxError. Note that if a utf-8 bom is found,
# 'utf-8-sig' is returned.
# If no encoding is specified, then the default will be returned. The
# default varied with version.
if sys.version_info <= (2, 4):
default = 'iso-8859-1'
else:
default = 'ascii'
bom_found = False
encoding = None
def read_or_stop():
"""Get the next source line, or ''."""
try:
return readline()
except StopIteration:
return ''
def find_cookie(line):
"""Find an encoding cookie in `line`."""
try:
line_string = line.decode('ascii')
except UnicodeDecodeError:
return None
matches = cookie_re.findall(line_string)
if not matches:
return None
encoding = _get_normal_name(matches[0])
try:
codec = codecs.lookup(encoding)
except LookupError:
# This behaviour mimics the Python interpreter
raise SyntaxError("unknown encoding: " + encoding)
if bom_found:
# codecs in 2.3 were raw tuples of functions, assume the best.
codec_name = getattr(codec, 'name', encoding)
if codec_name != 'utf-8':
# This behaviour mimics the Python interpreter
raise SyntaxError('encoding problem: utf-8')
encoding += '-sig'
return encoding
first = read_or_stop()
if first.startswith(codecs.BOM_UTF8):
bom_found = True
first = first[3:]
default = 'utf-8-sig'
if not first:
return default
encoding = find_cookie(first)
if encoding:
return encoding
second = read_or_stop()
if not second:
return default
encoding = find_cookie(second)
if encoding:
return encoding
return default |
Load the default config file from the default ipython_dir. | def load_default_config(ipython_dir=None):
"""Load the default config file from the default ipython_dir.
This is useful for embedded shells.
"""
if ipython_dir is None:
ipython_dir = get_ipython_dir()
profile_dir = os.path.join(ipython_dir, 'profile_default')
cl = PyFileConfigLoader(default_config_file_name, profile_dir)
try:
config = cl.load_config()
except ConfigFileNotFound:
# no config found
config = Config()
return config |
Return a string containing a crash report. | def make_report(self,traceback):
"""Return a string containing a crash report."""
sec_sep = self.section_sep
# Start with parent report
report = [super(IPAppCrashHandler, self).make_report(traceback)]
# Add interactive-specific info we may have
rpt_add = report.append
try:
rpt_add(sec_sep+"History of session input:")
for line in self.app.shell.user_ns['_ih']:
rpt_add(line)
rpt_add('\n*** Last line of input (may not be in above history):\n')
rpt_add(self.app.shell._last_input_line+'\n')
except:
pass
return ''.join(report) |
This has to be in a method for TerminalIPythonApp to be available. | def _classes_default(self):
"""This has to be in a method, for TerminalIPythonApp to be available."""
return [
InteractiveShellApp, # ShellApp comes before TerminalApp, because
self.__class__, # it will also affect subclasses (e.g. QtConsole)
TerminalInteractiveShell,
PromptManager,
HistoryManager,
ProfileDir,
PlainTextFormatter,
IPCompleter,
ScriptMagics,
] |
override to allow old - pylab flag with deprecation warning | def parse_command_line(self, argv=None):
"""override to allow old '-pylab' flag with deprecation warning"""
argv = sys.argv[1:] if argv is None else argv
if '-pylab' in argv:
# deprecated `-pylab` given,
# warn and transform into current syntax
argv = argv[:] # copy, don't clobber
idx = argv.index('-pylab')
warn.warn("`-pylab` flag has been deprecated.\n"
" Use `--pylab` instead, or `--pylab=foo` to specify a backend.")
sub = '--pylab'
if len(argv) > idx+1:
# check for gui arg, as in '-pylab qt'
gui = argv[idx+1]
if gui in ('wx', 'qt', 'qt4', 'gtk', 'auto'):
sub = '--pylab='+gui
argv.pop(idx+1)
argv[idx] = sub
return super(TerminalIPythonApp, self).parse_command_line(argv) |
Do actions after construct but before starting the app. | def initialize(self, argv=None):
"""Do actions after construct, but before starting the app."""
super(TerminalIPythonApp, self).initialize(argv)
if self.subapp is not None:
# don't bother initializing further, starting subapp
return
if not self.ignore_old_config:
check_for_old_config(self.ipython_dir)
# print self.extra_args
if self.extra_args and not self.something_to_run:
self.file_to_run = self.extra_args[0]
self.init_path()
# create the shell
self.init_shell()
# and draw the banner
self.init_banner()
# Now a variety of things that happen after the banner is printed.
self.init_gui_pylab()
self.init_extensions()
self.init_code() |
initialize the InteractiveShell instance | def init_shell(self):
"""initialize the InteractiveShell instance"""
# Create an InteractiveShell instance.
# shell.display_banner should always be False for the terminal
# based app, because we call shell.show_banner() by hand below
# so the banner shows *before* all extension loading stuff.
self.shell = TerminalInteractiveShell.instance(config=self.config,
display_banner=False, profile_dir=self.profile_dir,
ipython_dir=self.ipython_dir)
self.shell.configurables.append(self) |
optionally display the banner | def init_banner(self):
"""optionally display the banner"""
if self.display_banner and self.interact:
self.shell.show_banner()
# Make sure there is a space below the banner.
if self.log_level <= logging.INFO: print |
Replace -- pylab = inline with -- pylab = auto | def _pylab_changed(self, name, old, new):
"""Replace --pylab='inline' with --pylab='auto'"""
if new == 'inline':
warn.warn("'inline' not available as pylab backend, "
"using 'auto' instead.\n")
self.pylab = 'auto' |
Returns a string containing the class name of an object with the correct indefinite article ( a or an ) preceding it ( e. g. an Image a PlotValue ). | def class_of ( object ):
""" Returns a string containing the class name of an object with the
correct indefinite article ('a' or 'an') preceding it (e.g., 'an Image',
'a PlotValue').
"""
if isinstance( object, basestring ):
return add_article( object )
return add_article( object.__class__.__name__ ) |
Return a string representation of a value and its type for readable error messages. | def repr_type(obj):
""" Return a string representation of a value and its type for readable
error messages.
"""
the_type = type(obj)
if (not py3compat.PY3) and the_type is InstanceType:
# Old-style class.
the_type = obj.__class__
msg = '%r %r' % (obj, the_type)
return msg |
Convert the name argument to a list of names. | def parse_notifier_name(name):
"""Convert the name argument to a list of names.
Examples
--------
>>> parse_notifier_name('a')
['a']
>>> parse_notifier_name(['a','b'])
['a', 'b']
>>> parse_notifier_name(None)
['anytrait']
"""
if isinstance(name, str):
return [name]
elif name is None:
return ['anytrait']
elif isinstance(name, (list, tuple)):
for n in name:
assert isinstance(n, str), "names must be strings"
return name |
Set the default value on a per instance basis. | def set_default_value(self, obj):
"""Set the default value on a per instance basis.
This method is called by :meth:`instance_init` to create and
validate the default value. The creation and validation of
default values must be delayed until the parent :class:`HasTraits`
class has been instantiated.
"""
# Check for a deferred initializer defined in the same class as the
# trait declaration or above.
mro = type(obj).mro()
meth_name = '_%s_default' % self.name
for cls in mro[:mro.index(self.this_class)+1]:
if meth_name in cls.__dict__:
break
else:
# We didn't find one. Do static initialization.
dv = self.get_default_value()
newdv = self._validate(obj, dv)
obj._trait_values[self.name] = newdv
return
# Complete the dynamic initialization.
obj._trait_dyn_inits[self.name] = cls.__dict__[meth_name] |
Setup a handler to be called when a trait changes. | def on_trait_change(self, handler, name=None, remove=False):
"""Setup a handler to be called when a trait changes.
This is used to setup dynamic notifications of trait changes.
Static handlers can be created by creating methods on a HasTraits
subclass with the naming convention '_[traitname]_changed'. Thus,
to create static handler for the trait 'a', create the method
_a_changed(self, name, old, new) (fewer arguments can be used, see
below).
Parameters
----------
handler : callable
A callable that is called when a trait changes. Its
signature can be handler(), handler(name), handler(name, new)
or handler(name, old, new).
name : list, str, None
If None, the handler will apply to all traits. If a list
of str, handler will apply to all names in the list. If a
str, the handler will apply just to that name.
remove : bool
If False (the default), then install the handler. If True
then unintall it.
"""
if remove:
names = parse_notifier_name(name)
for n in names:
self._remove_notifiers(handler, n)
else:
names = parse_notifier_name(name)
for n in names:
self._add_notifiers(handler, n) |
Get a list of all the traits of this class. | def class_traits(cls, **metadata):
"""Get a list of all the traits of this class.
This method is just like the :meth:`traits` method, but is unbound.
The TraitTypes returned don't know anything about the values
that the various HasTrait's instances are holding.
This follows the same algorithm as traits does and does not allow
for any simple way of specifying merely that a metadata name
exists, but has any value. This is because get_metadata returns
None if a metadata key doesn't exist.
"""
traits = dict([memb for memb in getmembers(cls) if \
isinstance(memb[1], TraitType)])
if len(metadata) == 0:
return traits
for meta_name, meta_eval in metadata.items():
if type(meta_eval) is not FunctionType:
metadata[meta_name] = _SimpleTest(meta_eval)
result = {}
for name, trait in traits.items():
for meta_name, meta_eval in metadata.items():
if not meta_eval(trait.get_metadata(meta_name)):
break
else:
result[name] = trait
return result |
Get metadata values for trait by key. | def trait_metadata(self, traitname, key):
"""Get metadata values for trait by key."""
try:
trait = getattr(self.__class__, traitname)
except AttributeError:
raise TraitError("Class %s does not have a trait named %s" %
(self.__class__.__name__, traitname))
else:
return trait.get_metadata(key) |
Validates that the value is a valid object instance. | def validate(self, obj, value):
"""Validates that the value is a valid object instance."""
try:
if issubclass(value, self.klass):
return value
except:
if (value is None) and (self._allow_none):
return value
self.error(obj, value) |
Returns a description of the trait. | def info(self):
""" Returns a description of the trait."""
if isinstance(self.klass, basestring):
klass = self.klass
else:
klass = self.klass.__name__
result = 'a subclass of ' + klass
if self._allow_none:
return result + ' or None'
return result |
Instantiate a default value instance. | def get_default_value(self):
"""Instantiate a default value instance.
This is called when the containing HasTraits classes'
:meth:`__new__` method is called to ensure that a unique instance
is created for each HasTraits instance.
"""
dv = self.default_value
if isinstance(dv, DefaultValueGenerator):
return dv.generate(self.klass)
else:
return dv |
Returns a description of the trait. | def info(self):
""" Returns a description of the trait."""
result = 'any of ' + repr(self.values)
if self._allow_none:
return result + ' or None'
return result |
Helper for | def _require(*names):
"""Helper for @require decorator."""
from IPython.parallel.error import UnmetDependency
user_ns = globals()
for name in names:
if name in user_ns:
continue
try:
exec 'import %s'%name in user_ns
except ImportError:
raise UnmetDependency(name)
return True |
Simple decorator for requiring names to be importable. Examples -------- In [ 1 ]: | def require(*mods):
"""Simple decorator for requiring names to be importable.
Examples
--------
In [1]: @require('numpy')
...: def norm(a):
...: import numpy
...: return numpy.linalg.norm(a,2)
"""
names = []
for mod in mods:
if isinstance(mod, ModuleType):
mod = mod.__name__
if isinstance(mod, basestring):
names.append(mod)
else:
raise TypeError("names must be modules or module names, not %s"%type(mod))
return depend(_require, *names) |
check whether our dependencies have been met. | def check(self, completed, failed=None):
"""check whether our dependencies have been met."""
if len(self) == 0:
return True
against = set()
if self.success:
against = completed
if failed is not None and self.failure:
against = against.union(failed)
if self.all:
return self.issubset(against)
else:
return not self.isdisjoint(against) |
return whether this dependency has become impossible. | def unreachable(self, completed, failed=None):
"""return whether this dependency has become impossible."""
if len(self) == 0:
return False
against = set()
if not self.success:
against = completed
if failed is not None and not self.failure:
against = against.union(failed)
if self.all:
return not self.isdisjoint(against)
else:
return self.issubset(against) |
Represent this dependency as a dict. For json compatibility. | def as_dict(self):
"""Represent this dependency as a dict. For json compatibility."""
return dict(
dependencies=list(self),
all=self.all,
success=self.success,
failure=self.failure
) |
Returns a Solver instance | def Ainv(self):
'Returns a Solver instance'
if not hasattr(self, '_Ainv'):
self._Ainv = self.Solver(self.A)
return self._Ainv |
Returns a Solver instance | def Ainv(self):
'Returns a Solver instance'
if getattr(self, '_Ainv', None) is None:
self._Ainv = self.Solver(self.A, 13)
self._Ainv.run_pardiso(12)
return self._Ainv |
construct { child: parent } dict representation of a binary tree keys are the nodes in the tree and values are the parent of each node. The root node has parent parent default: None. >>> tree = bintree ( range ( 7 )) >>> tree { 0: None 1: 0 2: 1 3: 1 4: 0 5: 4 6: 4 } >>> print_bintree ( tree ) 0 1 2 3 4 5 6 | def bintree(ids, parent=None):
"""construct {child:parent} dict representation of a binary tree
keys are the nodes in the tree, and values are the parent of each node.
The root node has parent `parent`, default: None.
>>> tree = bintree(range(7))
>>> tree
{0: None, 1: 0, 2: 1, 3: 1, 4: 0, 5: 4, 6: 4}
>>> print_bintree(tree)
0
1
2
3
4
5
6
"""
parents = {}
n = len(ids)
if n == 0:
return parents
root = ids[0]
parents[root] = parent
if len(ids) == 1:
return parents
else:
ids = ids[1:]
n = len(ids)
left = bintree(ids[:n/2], parent=root)
right = bintree(ids[n/2:], parent=root)
parents.update(left)
parents.update(right)
return parents |
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