title stringlengths 10 172 | question_id int64 469 40.1M | question_body stringlengths 22 48.2k | question_score int64 -44 5.52k | question_date stringlengths 20 20 | answer_id int64 497 40.1M | answer_body stringlengths 18 33.9k | answer_score int64 -38 8.38k | answer_date stringlengths 20 20 | tags list |
|---|---|---|---|---|---|---|---|---|---|
python: finding a missing letter in the alphabet from a list - least lines of code | 704,526 | <p>I'm trying to find the missing letter in the alphabet from the list with the least lines of code.</p>
<p>If the list is sorted already (using list.sort()), what is the fastest or least lines of code to find the missing letter.</p>
<p>If I know there are only one missing letter.</p>
<p>(This is not any type of int... | 2 | 2009-04-01T08:08:19Z | 7,908,322 | <pre><code>class MissingFinder(object):
"A simplified missing items locator"
def __init__(self, alphabet):
"Store a set from our alphabet"
self.alphabet= set(alphabet)
def missing(self, sequence):
"Return set of missing letters; sequence not necessarily set"
return self.alpha... | 0 | 2011-10-26T20:13:32Z | [
"python"
] |
Using python ctypes to get buffer of floats from shared library into python string | 704,777 | <p>I'm trying to use python ctypes to use these two C functions from a shared library:</p>
<pre>
<code>bool decompress_rgb(unsigned char *data, long dataLen, int scale)
float* getRgbBuffer()</code></pre>
<p>The first function is working fine. I can tell by putting some debug code in the shared library and checking th... | 2 | 2009-04-01T09:34:40Z | 704,952 | <p>Not fully tested, but I think it's something along this line:</p>
<pre><code>buffer_size = 720 * 288 * ctypes.sizeof(ctypes.c_float)
rgb_buffer = ctypes.create_string_buffer(buffer_size)
ctypes.memmove(rgb_buffer, getRgbBuffer(), buffer_size)
</code></pre>
<p>Key is the <code>ctypes.memmove()</code> function. Fro... | 3 | 2009-04-01T10:39:03Z | [
"python",
"pointers",
"return-value",
"ctypes"
] |
Using python ctypes to get buffer of floats from shared library into python string | 704,777 | <p>I'm trying to use python ctypes to use these two C functions from a shared library:</p>
<pre>
<code>bool decompress_rgb(unsigned char *data, long dataLen, int scale)
float* getRgbBuffer()</code></pre>
<p>The first function is working fine. I can tell by putting some debug code in the shared library and checking th... | 2 | 2009-04-01T09:34:40Z | 705,735 | <p>It's been a while since I used ctypes and I don't have something which returns a "double *" handy enough to test this out, but if you want a c_float_p:</p>
<pre><code>c_float_p = ctypes.POINTER(ctypes.c_float)
</code></pre>
<p>Reading BastardSaint's answer, you just want the raw data, but I wasn't sure if you're d... | 2 | 2009-04-01T14:18:53Z | [
"python",
"pointers",
"return-value",
"ctypes"
] |
Does anyone know about workflow frameworks/libraries in Python? | 704,834 | <p>I'm searching for a workflow library/framework for Python. I'm astonished that there I cannot find anything which is simple and not attached to Zope/Plone. </p>
<p>Does anyone know of an open-source, simple workflow library/framework. It's preferred to support Django, but not required.</p>
| 15 | 2009-04-01T09:54:00Z | 704,838 | <p>I know there is an openerp, but it's not workflow.....</p>
| 0 | 2009-04-01T09:56:26Z | [
"python",
"django",
"workflow"
] |
Does anyone know about workflow frameworks/libraries in Python? | 704,834 | <p>I'm searching for a workflow library/framework for Python. I'm astonished that there I cannot find anything which is simple and not attached to Zope/Plone. </p>
<p>Does anyone know of an open-source, simple workflow library/framework. It's preferred to support Django, but not required.</p>
| 15 | 2009-04-01T09:54:00Z | 704,938 | <p>Try <a href="http://code.djangoproject.com/wiki/GoFlow">GoFlow</a>, a workflow engine for Django.</p>
| 11 | 2009-04-01T10:31:10Z | [
"python",
"django",
"workflow"
] |
Does anyone know about workflow frameworks/libraries in Python? | 704,834 | <p>I'm searching for a workflow library/framework for Python. I'm astonished that there I cannot find anything which is simple and not attached to Zope/Plone. </p>
<p>Does anyone know of an open-source, simple workflow library/framework. It's preferred to support Django, but not required.</p>
| 15 | 2009-04-01T09:54:00Z | 707,052 | <p>Besides GoFlow (linked in Oli's answer) the only other Django workflow I know of is part of the <a href="http://www.pinaxproject.com" rel="nofollow">Pinax</a> project.</p>
<p>More generally for Python based workflows there is <a href="http://code.google.com/p/spiff-workflow/" rel="nofollow">spiff workflow</a> and D... | 0 | 2009-04-01T19:48:23Z | [
"python",
"django",
"workflow"
] |
Does anyone know about workflow frameworks/libraries in Python? | 704,834 | <p>I'm searching for a workflow library/framework for Python. I'm astonished that there I cannot find anything which is simple and not attached to Zope/Plone. </p>
<p>Does anyone know of an open-source, simple workflow library/framework. It's preferred to support Django, but not required.</p>
| 15 | 2009-04-01T09:54:00Z | 708,221 | <p>Another workflow project that I saw recently was repoze.workflow, which is a state-machine based workflow engine which was inspired by plone, but is a clean re-implementation. </p>
<p><a href="http://svn.repoze.org/repoze.workflow/trunk/docs/index.rst" rel="nofollow">http://svn.repoze.org/repoze.workflow/trunk/docs... | 4 | 2009-04-02T03:51:35Z | [
"python",
"django",
"workflow"
] |
Does anyone know about workflow frameworks/libraries in Python? | 704,834 | <p>I'm searching for a workflow library/framework for Python. I'm astonished that there I cannot find anything which is simple and not attached to Zope/Plone. </p>
<p>Does anyone know of an open-source, simple workflow library/framework. It's preferred to support Django, but not required.</p>
| 15 | 2009-04-01T09:54:00Z | 1,113,998 | <p>I used hurry.workflow: <a href="http://pypi.python.org/pypi/hurry.workflow" rel="nofollow">http://pypi.python.org/pypi/hurry.workflow</a>
It has plenty of features but unfortunately has some zope dependecies so it may be not applicable for other frameworks.</p>
| 1 | 2009-07-11T15:56:41Z | [
"python",
"django",
"workflow"
] |
Does anyone know about workflow frameworks/libraries in Python? | 704,834 | <p>I'm searching for a workflow library/framework for Python. I'm astonished that there I cannot find anything which is simple and not attached to Zope/Plone. </p>
<p>Does anyone know of an open-source, simple workflow library/framework. It's preferred to support Django, but not required.</p>
| 15 | 2009-04-01T09:54:00Z | 1,512,988 | <p>ntoll's <a href="http://github.com/ntoll/workflow" rel="nofollow">workflow</a> for django is alpha, but is actively developed</p>
| 0 | 2009-10-03T06:31:16Z | [
"python",
"django",
"workflow"
] |
Does anyone know about workflow frameworks/libraries in Python? | 704,834 | <p>I'm searching for a workflow library/framework for Python. I'm astonished that there I cannot find anything which is simple and not attached to Zope/Plone. </p>
<p>Does anyone know of an open-source, simple workflow library/framework. It's preferred to support Django, but not required.</p>
| 15 | 2009-04-01T09:54:00Z | 3,418,749 | <p>Unfortunately it seems like most/all of the projects listed here are no longer active. Here's a new project which is currently ongoing:</p>
<p><a href="http://packages.python.org/django-workflows/overview.html" rel="nofollow">http://packages.python.org/django-workflows/overview.html</a></p>
| 5 | 2010-08-05T20:07:49Z | [
"python",
"django",
"workflow"
] |
Does anyone know about workflow frameworks/libraries in Python? | 704,834 | <p>I'm searching for a workflow library/framework for Python. I'm astonished that there I cannot find anything which is simple and not attached to Zope/Plone. </p>
<p>Does anyone know of an open-source, simple workflow library/framework. It's preferred to support Django, but not required.</p>
| 15 | 2009-04-01T09:54:00Z | 12,037,650 | <p>There is also Xworkflows ( <a href="https://github.com/rbarrois/xworkflows/" rel="nofollow">https://github.com/rbarrois/xworkflows/</a> ) and it's pluggable to django with django-xworkflofws ( <a href="https://github.com/rbarrois/django_xworkflows" rel="nofollow">https://github.com/rbarrois/django_xworkflows</a> )<... | 0 | 2012-08-20T12:28:54Z | [
"python",
"django",
"workflow"
] |
Does anyone know about workflow frameworks/libraries in Python? | 704,834 | <p>I'm searching for a workflow library/framework for Python. I'm astonished that there I cannot find anything which is simple and not attached to Zope/Plone. </p>
<p>Does anyone know of an open-source, simple workflow library/framework. It's preferred to support Django, but not required.</p>
| 15 | 2009-04-01T09:54:00Z | 19,059,857 | <p>Have you thought about building workflows with rules? You might checkout <a href="http://nebrios.com" rel="nofollow">http://nebrios.com</a>, a rules based workflow tool. It's built in Python/Django and executes full Python and Django. It's not FOSS though, and doesn't integrate as a library since it's Platform.</p>
... | 0 | 2013-09-27T20:51:21Z | [
"python",
"django",
"workflow"
] |
Does anyone know about workflow frameworks/libraries in Python? | 704,834 | <p>I'm searching for a workflow library/framework for Python. I'm astonished that there I cannot find anything which is simple and not attached to Zope/Plone. </p>
<p>Does anyone know of an open-source, simple workflow library/framework. It's preferred to support Django, but not required.</p>
| 15 | 2009-04-01T09:54:00Z | 37,567,247 | <p>We are actively working on Zops Workflow Engine based on Spiff. You can check if it suits your needs.</p>
<p><a href="https://github.com/zetaops/zengine" rel="nofollow">https://github.com/zetaops/zengine</a></p>
| 0 | 2016-06-01T11:22:36Z | [
"python",
"django",
"workflow"
] |
Importing in Python between three or more files not working | 704,856 | <p>I hav codes eg1.py , eg2.py , eg3.py
eg3.py imports eg2.py which in turn imports eg1.py</p>
<p>When i run eg3.py for first time everything is fine
If i import it again and again only eg3.py runs</p>
<p>I need a solution for this.</p>
<p>I will code eg3.py in such a way that :</p>
<pre><code>while(1):
import ... | -2 | 2009-04-01T10:01:13Z | 704,863 | <p>Huh? You can't loop an <code>import</code>, they are cached so it doesn't really do anything except waste cycles, after the first iteration.</p>
<p>How do you know that "only eg3.py" runs?</p>
| 1 | 2009-04-01T10:03:36Z | [
"python",
"import"
] |
Importing in Python between three or more files not working | 704,856 | <p>I hav codes eg1.py , eg2.py , eg3.py
eg3.py imports eg2.py which in turn imports eg1.py</p>
<p>When i run eg3.py for first time everything is fine
If i import it again and again only eg3.py runs</p>
<p>I need a solution for this.</p>
<p>I will code eg3.py in such a way that :</p>
<pre><code>while(1):
import ... | -2 | 2009-04-01T10:01:13Z | 704,874 | <p>Do you want to execute the code in eg2.py when you import it? That is not a good solution. You should have a function containing your code in eg2.py and then execute this function in your while loop.</p>
<p>In eg2.py:</p>
<pre><code>def my_func():
# do useful stuff
pass
</code></pre>
<p>In eg3.py</p>
<pr... | 7 | 2009-04-01T10:08:21Z | [
"python",
"import"
] |
Importing in Python between three or more files not working | 704,856 | <p>I hav codes eg1.py , eg2.py , eg3.py
eg3.py imports eg2.py which in turn imports eg1.py</p>
<p>When i run eg3.py for first time everything is fine
If i import it again and again only eg3.py runs</p>
<p>I need a solution for this.</p>
<p>I will code eg3.py in such a way that :</p>
<pre><code>while(1):
import ... | -2 | 2009-04-01T10:01:13Z | 704,877 | <p>If you import a module that is already imported, executable code in that module will not be re-run.</p>
<p>E.g.:</p>
<pre><code>>>> import this
The Zen of Python, by Tim Peters
Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.
Complex is better than complicat... | 0 | 2009-04-01T10:09:14Z | [
"python",
"import"
] |
check permissions of directories in python | 704,945 | <p>hi
i want a python program that given a directory, it will return all directories within that directory that have 775 (<code>rwxrwxr-x</code>) permissions</p>
<p>thanks!</p>
| 1 | 2009-04-01T10:35:37Z | 704,953 | <p>Does it have to be python?</p>
<p>You can also use find to do that :</p>
<p>"find . -perm 775"</p>
| -2 | 2009-04-01T10:39:07Z | [
"python",
"chmod"
] |
check permissions of directories in python | 704,945 | <p>hi
i want a python program that given a directory, it will return all directories within that directory that have 775 (<code>rwxrwxr-x</code>) permissions</p>
<p>thanks!</p>
| 1 | 2009-04-01T10:35:37Z | 704,954 | <p>Take a look at the <a href="http://docs.python.org/library/os.html">os</a> module. In particular <a href="http://docs.python.org/library/os.html#os.stat">os.stat</a> to look at the permission bits.</p>
<pre><code>import os
for filename in os.listdir(dirname):
path=os.path.join(dirname, filename)
if os.path... | 5 | 2009-04-01T10:40:15Z | [
"python",
"chmod"
] |
check permissions of directories in python | 704,945 | <p>hi
i want a python program that given a directory, it will return all directories within that directory that have 775 (<code>rwxrwxr-x</code>) permissions</p>
<p>thanks!</p>
| 1 | 2009-04-01T10:35:37Z | 705,088 | <p>Neither answer recurses, though it's not entirely clear that that's what the OP wants. Here's a recursive approach (untested, but you get the idea):</p>
<pre><code>import os
import stat
import sys
MODE = "775"
def mode_matches(mode, file):
"""Return True if 'file' matches 'mode'.
'mode' should be an inte... | 6 | 2009-04-01T11:31:27Z | [
"python",
"chmod"
] |
check permissions of directories in python | 704,945 | <p>hi
i want a python program that given a directory, it will return all directories within that directory that have 775 (<code>rwxrwxr-x</code>) permissions</p>
<p>thanks!</p>
| 1 | 2009-04-01T10:35:37Z | 705,201 | <p>Compact generator based on Brian's answer:</p>
<pre><code>import os
(fpath for fpath
in (os.path.join(dirname,fname) for fname in os.listdir(dirname))
if (os.path.isdir(fpath) and (os.stat(fpath).st_mode & 0777) == 0775))
</code></pre>
| 2 | 2009-04-01T12:06:14Z | [
"python",
"chmod"
] |
Add event to list | 705,296 | <p>I want to add event to list such that on adding items actions are taken based on the item e.g. genrating new data structures, change in screen output or raising exception.</p>
<p>How do I accomplish this?</p>
| 1 | 2009-04-01T12:38:59Z | 705,334 | <p>You could create your own class that extends the list object:</p>
<pre><code>class myList(list):
def myAppend(self, item):
if isinstance(item, list):
print 'Appending a list'
self.append(item)
elif isinstance(item, str):
print 'Appending a string item'
... | 1 | 2009-04-01T12:50:08Z | [
"python"
] |
indentation of multiline string | 705,370 | <p>I have a script that uses the cmd Python module. The cmd module uses a triple quoted multiline string as it's help text. Something like this</p>
<pre><code>def x(self, strags = None):
"""class
help text here
and some more help text here"""
</code></pre>
<p>When running the script, the command 'help x' ... | 4 | 2009-04-01T12:56:32Z | 705,383 | <p>I'd handle it by having consistent indents, like this:</p>
<pre><code>def x(self, strags = None):
"""
class
help text here
and some more help text here
"""
</code></pre>
<p>Sure, it takes two lines more, but it also injects clarity (in my opinion) by making the doc comment stand out quite well.... | 1 | 2009-04-01T12:59:46Z | [
"python",
"cmd",
"indentation"
] |
indentation of multiline string | 705,370 | <p>I have a script that uses the cmd Python module. The cmd module uses a triple quoted multiline string as it's help text. Something like this</p>
<pre><code>def x(self, strags = None):
"""class
help text here
and some more help text here"""
</code></pre>
<p>When running the script, the command 'help x' ... | 4 | 2009-04-01T12:56:32Z | 705,564 | <p>Personally I try to follow <a href="http://www.python.org/dev/peps/pep-0008/" rel="nofollow">PEP 8</a> which refers the reader to <a href="http://www.python.org/dev/peps/pep-0257/" rel="nofollow">PEP 257</a> for Docstring Conventions. It has an entire section on multi-line docstrings.</p>
| 2 | 2009-04-01T13:49:01Z | [
"python",
"cmd",
"indentation"
] |
What encoding do I need to display a GBP sign (pound sign) using python on cygwin in Windows XP? | 705,434 | <p>I have a python (2.5.4) script which I run in cygwin (in a DOS box on Windows XP). I want to include a pound sign (£) in the output. If I do so, I get this error:</p>
<pre><code>SyntaxError: Non-ASCII character '\xa3' in file dbscan.py on line 253, but no encoding declared; see http://www.python.org/peps/pep-0263.... | 5 | 2009-04-01T13:18:23Z | 705,447 | <p>There are two encodings involved here:</p>
<ul>
<li>The encoding of your source code, which must be correct in order for your input file to mean what you think it means</li>
<li>The encoding of the output, which must be correct in order for the symbols emitted to display as expected.</li>
</ul>
<p>It seems your ou... | 2 | 2009-04-01T13:20:36Z | [
"python",
"encoding",
"python-2.5"
] |
What encoding do I need to display a GBP sign (pound sign) using python on cygwin in Windows XP? | 705,434 | <p>I have a python (2.5.4) script which I run in cygwin (in a DOS box on Windows XP). I want to include a pound sign (£) in the output. If I do so, I get this error:</p>
<pre><code>SyntaxError: Non-ASCII character '\xa3' in file dbscan.py on line 253, but no encoding declared; see http://www.python.org/peps/pep-0263.... | 5 | 2009-04-01T13:18:23Z | 707,723 | <p>The Unicode for a pound sign is 163 (decimal) or A3 in hex, so the following should work regardless of the encoding of your script, as long as the output encoding is working correctly.</p>
<pre><code>print u"\xA3"
</code></pre>
| 3 | 2009-04-01T23:22:19Z | [
"python",
"encoding",
"python-2.5"
] |
What encoding do I need to display a GBP sign (pound sign) using python on cygwin in Windows XP? | 705,434 | <p>I have a python (2.5.4) script which I run in cygwin (in a DOS box on Windows XP). I want to include a pound sign (£) in the output. If I do so, I get this error:</p>
<pre><code>SyntaxError: Non-ASCII character '\xa3' in file dbscan.py on line 253, but no encoding declared; see http://www.python.org/peps/pep-0263.... | 5 | 2009-04-01T13:18:23Z | 2,015,325 | <p>try the encoding :</p>
<p><code># -*- coding: utf-8 -*-</code></p>
<p>and then to display the '£' sign: </p>
<pre><code>print unichr(163)
</code></pre>
| 2 | 2010-01-06T18:44:03Z | [
"python",
"encoding",
"python-2.5"
] |
any way to loop iteration with same item in python? | 705,811 | <p>It's a common programming task to loop iteration while not receiving next item. For example:</p>
<pre><code>for sLine in oFile :
if ... some logic ... :
sLine = oFile.next()
... some more logic ...
# at this point i want to continue iteration but without
# getting next item from oFile. How can thi... | 0 | 2009-04-01T14:36:46Z | 705,817 | <p>I first thought you wanted the <code>continue</code> keyword, but that would of course get you the next line of input.</p>
<p>I think I'm stumped. When looping over the lines of a file, what exactly should happen if you continued the loop without getting a new line?</p>
<p>Do you want to inspect the line again? If... | 3 | 2009-04-01T14:38:23Z | [
"python",
"iterator"
] |
any way to loop iteration with same item in python? | 705,811 | <p>It's a common programming task to loop iteration while not receiving next item. For example:</p>
<pre><code>for sLine in oFile :
if ... some logic ... :
sLine = oFile.next()
... some more logic ...
# at this point i want to continue iteration but without
# getting next item from oFile. How can thi... | 0 | 2009-04-01T14:36:46Z | 705,827 | <p>Instead of looping through the file line by line, you can do a file.readlines() into a list. Then loop through the list (which allows you to look at the next item if you want). Example:</p>
<pre><code>list = oFile.readlines()
for i in range(len(list))
#your stuff
list[i] #current line
list[i-1] #previ... | 0 | 2009-04-01T14:40:45Z | [
"python",
"iterator"
] |
any way to loop iteration with same item in python? | 705,811 | <p>It's a common programming task to loop iteration while not receiving next item. For example:</p>
<pre><code>for sLine in oFile :
if ... some logic ... :
sLine = oFile.next()
... some more logic ...
# at this point i want to continue iteration but without
# getting next item from oFile. How can thi... | 0 | 2009-04-01T14:36:46Z | 705,848 | <p>What you need is a simple, deterministic <a href="http://www.ibm.com/developerworks/library/l-python-state.html" rel="nofollow">finite state machine</a>. Something like this...</p>
<pre><code>state = 1
for sLine in oFile:
if state == 1:
if ... some logic ... :
state = 2
elif state == 2:
i... | 1 | 2009-04-01T14:43:57Z | [
"python",
"iterator"
] |
any way to loop iteration with same item in python? | 705,811 | <p>It's a common programming task to loop iteration while not receiving next item. For example:</p>
<pre><code>for sLine in oFile :
if ... some logic ... :
sLine = oFile.next()
... some more logic ...
# at this point i want to continue iteration but without
# getting next item from oFile. How can thi... | 0 | 2009-04-01T14:36:46Z | 705,882 | <p>jle's approach should work, though you might as well use enumerate():</p>
<pre><code>for linenr, line in enumerate(oFile):
# your stuff
</code></pre>
| -2 | 2009-04-01T14:49:41Z | [
"python",
"iterator"
] |
any way to loop iteration with same item in python? | 705,811 | <p>It's a common programming task to loop iteration while not receiving next item. For example:</p>
<pre><code>for sLine in oFile :
if ... some logic ... :
sLine = oFile.next()
... some more logic ...
# at this point i want to continue iteration but without
# getting next item from oFile. How can thi... | 0 | 2009-04-01T14:36:46Z | 705,891 | <p>Ugly. Wrap the body in another loop.</p>
<pre><code>for sLine in oFile :
while 1:
if ... some logic ... :
sLine = oFile.next()
... some more logic ...
continue
... some more logic ...
break
</code></pre>
<p>A little better:</p>
<pre><code>class pushback_iter(object):
def __init... | 0 | 2009-04-01T14:51:29Z | [
"python",
"iterator"
] |
any way to loop iteration with same item in python? | 705,811 | <p>It's a common programming task to loop iteration while not receiving next item. For example:</p>
<pre><code>for sLine in oFile :
if ... some logic ... :
sLine = oFile.next()
... some more logic ...
# at this point i want to continue iteration but without
# getting next item from oFile. How can thi... | 0 | 2009-04-01T14:36:46Z | 705,910 | <p>You can assign your iterator to an variable then use the .next get te next one.</p>
<pre><code>iter = oFile.xreadlines() # is this the correct iterator you want?
try:
sLine = iter.next()
while True:
if ... some logic ... :
sLine = iter.next()
... some more logic ...
continue
sLine = it... | -1 | 2009-04-01T14:54:36Z | [
"python",
"iterator"
] |
any way to loop iteration with same item in python? | 705,811 | <p>It's a common programming task to loop iteration while not receiving next item. For example:</p>
<pre><code>for sLine in oFile :
if ... some logic ... :
sLine = oFile.next()
... some more logic ...
# at this point i want to continue iteration but without
# getting next item from oFile. How can thi... | 0 | 2009-04-01T14:36:46Z | 706,508 | <p>Simply create an iterator of your own that lets you push data back on the front of the stream so that you can give the loop a line that you want to see over again:</p>
<pre>
next_lines = []
def prependIterator(i):
while True:
if next_lines:
yield(next_lines.pop())
else:
y... | 1 | 2009-04-01T17:09:30Z | [
"python",
"iterator"
] |
any way to loop iteration with same item in python? | 705,811 | <p>It's a common programming task to loop iteration while not receiving next item. For example:</p>
<pre><code>for sLine in oFile :
if ... some logic ... :
sLine = oFile.next()
... some more logic ...
# at this point i want to continue iteration but without
# getting next item from oFile. How can thi... | 0 | 2009-04-01T14:36:46Z | 706,761 | <p>You just need to create a variable out of your iterator, and then manipulate that:</p>
<pre>% cat /tmp/alt-lines.py
<code>#! /usr/bin/python -tt
import sys
lines = iter(open(sys.argv[1]))
for line in lines:
print line,
lines.next()
</code>
% cat /tmp/test
1
2
3
4
% /tmp/alt-lines.py /tmp/test
1
3
</pre>
... | -1 | 2009-04-01T18:15:34Z | [
"python",
"iterator"
] |
Caching data from other websites in Django | 705,855 | <p>Suppose I have a simple view which needs to parse data from an external website.</p>
<p>Right now it looks something like this:</p>
<pre><code>def index(request):
source = urllib2.urlopen(EXTERNAL_WEBSITE_URL)
bs = BeautifulSoup.BeautifulSoup(source.read())
finalList = [] # do whatever with bs to popul... | 1 | 2009-04-01T14:44:41Z | 705,887 | <p>First, don't optimize prematurely. Get this to work.</p>
<p>Then, add enough logging to see what the performance problems (if any) really are.</p>
<p>You may find that end-user's PC is the slowest part; getting data from another site may, actually, be remarkably fast when you do not fetch .JS libraries and .CSS a... | 5 | 2009-04-01T14:50:30Z | [
"python",
"django",
"caching"
] |
Caching data from other websites in Django | 705,855 | <p>Suppose I have a simple view which needs to parse data from an external website.</p>
<p>Right now it looks something like this:</p>
<pre><code>def index(request):
source = urllib2.urlopen(EXTERNAL_WEBSITE_URL)
bs = BeautifulSoup.BeautifulSoup(source.read())
finalList = [] # do whatever with bs to popul... | 1 | 2009-04-01T14:44:41Z | 705,893 | <p>Django has robust, built-in support for caching views: <a href="http://docs.djangoproject.com/en/dev/topics/cache/#topics-cache" rel="nofollow">http://docs.djangoproject.com/en/dev/topics/cache/#topics-cache</a>.</p>
<p>It offers solutions for caching entire views (such as in your case), or just certain parts of da... | 1 | 2009-04-01T14:51:39Z | [
"python",
"django",
"caching"
] |
Caching data from other websites in Django | 705,855 | <p>Suppose I have a simple view which needs to parse data from an external website.</p>
<p>Right now it looks something like this:</p>
<pre><code>def index(request):
source = urllib2.urlopen(EXTERNAL_WEBSITE_URL)
bs = BeautifulSoup.BeautifulSoup(source.read())
finalList = [] # do whatever with bs to popul... | 1 | 2009-04-01T14:44:41Z | 706,986 | <p>Caching with django is pretty easy,</p>
<pre><code>from django.core.cache import cache
key = 'some-key'
data = cache.get(key)
if data is None:
# soupify the page and what not
cache.set(data, key, 60*60*8)
return render_to_response ...
return render_to_response
</code></pre>
<p>To answer your questions,... | 3 | 2009-04-01T19:23:55Z | [
"python",
"django",
"caching"
] |
Python JSON decoding performance | 706,101 | <p>I'm using the <code>json</code> module in Python 2.6 to load and decode JSON files. However I'm currently getting slower than expected performance. I'm using a test case which is 6MB in size and <code>json.loads()</code> is taking 20 seconds.</p>
<p>I thought the <code>json</code> module had some native code to spe... | 36 | 2009-04-01T15:39:31Z | 706,250 | <p>Looking in my installation of Python 2.6.1 on windows, the <code>json</code> package loads the <code>_json</code> module, which is built into the runtime. <code>C</code> source for the <code>json speedups</code> module is <a href="http://svn.python.org/view/python/trunk/Modules/%5Fjson.c?view=markup" rel="nofollow">... | 2 | 2009-04-01T16:04:36Z | [
"python",
"json",
"python-2.6"
] |
Python JSON decoding performance | 706,101 | <p>I'm using the <code>json</code> module in Python 2.6 to load and decode JSON files. However I'm currently getting slower than expected performance. I'm using a test case which is 6MB in size and <code>json.loads()</code> is taking 20 seconds.</p>
<p>I thought the <code>json</code> module had some native code to spe... | 36 | 2009-04-01T15:39:31Z | 706,353 | <p>It may vary by platform, but the builtin json module is based on <a href="http://pypi.python.org/pypi/simplejson/">simplejson</a>, not including the C speedups. I've found simplejson to be as a fast as python-cjson anyway, so I prefer it since it obviously has the same interface as the builtin.</p>
<pre><code>try:... | 16 | 2009-04-01T16:30:29Z | [
"python",
"json",
"python-2.6"
] |
Python JSON decoding performance | 706,101 | <p>I'm using the <code>json</code> module in Python 2.6 to load and decode JSON files. However I'm currently getting slower than expected performance. I'm using a test case which is 6MB in size and <code>json.loads()</code> is taking 20 seconds.</p>
<p>I thought the <code>json</code> module had some native code to spe... | 36 | 2009-04-01T15:39:31Z | 5,541,345 | <p>Even though <code>_json</code> is available, I've noticed json decoding is very slow on CPython 2.6.6. I haven't compared with other implementations, but I've switched to string manipulation when inside performance-critical loops.</p>
| 1 | 2011-04-04T16:20:30Z | [
"python",
"json",
"python-2.6"
] |
Python JSON decoding performance | 706,101 | <p>I'm using the <code>json</code> module in Python 2.6 to load and decode JSON files. However I'm currently getting slower than expected performance. I'm using a test case which is 6MB in size and <code>json.loads()</code> is taking 20 seconds.</p>
<p>I thought the <code>json</code> module had some native code to spe... | 36 | 2009-04-01T15:39:31Z | 5,821,091 | <p>The new <a href="https://github.com/rtyler/py-yajl/">Yajl - Yet Another JSON Library</a> is very fast.</p>
<pre><code>yajl serialize: 0.180 deserialize: 0.182 total: 0.362
simplejson serialize: 0.840 deserialize: 0.490 total: 1.331
stdlib json serialize: 2.812 deserialize: 8.725 total: 11.537
</code><... | 21 | 2011-04-28T15:29:52Z | [
"python",
"json",
"python-2.6"
] |
Python JSON decoding performance | 706,101 | <p>I'm using the <code>json</code> module in Python 2.6 to load and decode JSON files. However I'm currently getting slower than expected performance. I'm using a test case which is 6MB in size and <code>json.loads()</code> is taking 20 seconds.</p>
<p>I thought the <code>json</code> module had some native code to spe... | 36 | 2009-04-01T15:39:31Z | 14,513,180 | <p>I was parsing the same file 10x. File size was 1,856,944 bytes.</p>
<p>Python 2.6:</p>
<pre><code>yajl serialize: 0.294 deserialize: 0.334 total: 0.627
cjson serialize: 0.494 deserialize: 0.276 total: 0.769
simplejson serialize: 0.554 deserialize: 0.268 total: 0.823
stdlib json serialize: 3.917... | 11 | 2013-01-25T00:09:00Z | [
"python",
"json",
"python-2.6"
] |
Python JSON decoding performance | 706,101 | <p>I'm using the <code>json</code> module in Python 2.6 to load and decode JSON files. However I'm currently getting slower than expected performance. I'm using a test case which is 6MB in size and <code>json.loads()</code> is taking 20 seconds.</p>
<p>I thought the <code>json</code> module had some native code to spe... | 36 | 2009-04-01T15:39:31Z | 15,440,843 | <p>take a look UltraJSON <a href="https://github.com/esnme/ultrajson">https://github.com/esnme/ultrajson</a></p>
<p>here my test (code from: <a href="https://gist.github.com/lightcatcher/1136415">https://gist.github.com/lightcatcher/1136415</a>)</p>
<p>platform: OS X 10.8.3 MBP 2.2 GHz Intel Core i7</p>
<p>JSON:</p>... | 11 | 2013-03-15T19:41:37Z | [
"python",
"json",
"python-2.6"
] |
Django admin style application for Java | 706,405 | <p>I'm looking for a web framework or an application in Java that does what Django admin does - provides a friendly user interface for editing data in a relational database. I know it's possible to run Django on Jython and that way achieve a somewhat Java-based solution, but I'd prefer something pure-Java to keep the h... | 7 | 2009-04-01T16:41:31Z | 708,863 | <p>What you mean is CRUD generating (CRUD: create, read, update, delete = typical admin interface). For example <a href="http://rifers.org/theater/demo1%5Frifecrud" rel="nofollow">Rife</a> can do this.</p>
| 0 | 2009-04-02T08:52:25Z | [
"java",
"python",
"django"
] |
Django admin style application for Java | 706,405 | <p>I'm looking for a web framework or an application in Java that does what Django admin does - provides a friendly user interface for editing data in a relational database. I know it's possible to run Django on Jython and that way achieve a somewhat Java-based solution, but I'd prefer something pure-Java to keep the h... | 7 | 2009-04-01T16:41:31Z | 729,426 | <p>Try <a href="http://grails.org/" rel="nofollow">Grails</a>. It's a framework modeled after Django, written in <a href="http://groovy.codehaus.org/" rel="nofollow">Groovy</a>. Groovy is a JVM based language, source-compatible with Java.</p>
<p>To get a Django-like admin interface, you write your models, let Grails g... | 3 | 2009-04-08T10:46:20Z | [
"java",
"python",
"django"
] |
Django admin style application for Java | 706,405 | <p>I'm looking for a web framework or an application in Java that does what Django admin does - provides a friendly user interface for editing data in a relational database. I know it's possible to run Django on Jython and that way achieve a somewhat Java-based solution, but I'd prefer something pure-Java to keep the h... | 7 | 2009-04-01T16:41:31Z | 3,300,573 | <p><a href="http://www.springsource.org/roo" rel="nofollow">Spring ROO</a> is probably what you are looking for - it's a pure Java solution. </p>
| 3 | 2010-07-21T14:52:26Z | [
"java",
"python",
"django"
] |
Complex Beautiful Soup query | 706,443 | <p>Here is a snippet of an HTML file I'm exploring with Beautiful Soup.</p>
<pre><code><td width="50%">
<strong class="sans"><a href="http:/website">Site</a></strong> <br />
</code></pre>
<p>I would like to get the <code><a href></code> for any line which has the <code>&l... | 3 | 2009-04-01T16:51:24Z | 706,531 | <p>BeautifulSoup's search mechanisms accept a callable, which the docs appear to recommend for your case: "If you need to impose complex or interlocking restrictions on a tag's attributes, pass in a callable object for name,...". (ok... they're talking about attributes specifically, but the advice reflects an underlyin... | 9 | 2009-04-01T17:15:12Z | [
"python",
"beautifulsoup"
] |
Complex Beautiful Soup query | 706,443 | <p>Here is a snippet of an HTML file I'm exploring with Beautiful Soup.</p>
<pre><code><td width="50%">
<strong class="sans"><a href="http:/website">Site</a></strong> <br />
</code></pre>
<p>I would like to get the <code><a href></code> for any line which has the <code>&l... | 3 | 2009-04-01T16:51:24Z | 706,549 | <pre><code>>>> BeautifulSoup.BeautifulSoup("""<html><td width="50%">
... <strong class="sans"><a href="http:/website">Site</a></strong> <br />
... </html>""" )
<html><td width="50%">
<strong class="sans"><a href="http:/website">Site<... | 0 | 2009-04-01T17:19:33Z | [
"python",
"beautifulsoup"
] |
Python: Using minidom to search for nodes with a certain text | 706,453 | <p>I am currently faced with XML that looks like this:</p>
<pre><code><ID>345754</ID>
</code></pre>
<p>This is contained within a hierarchy. I have parsed the xml, and wish to find the ID node by searching on "345754".</p>
| 1 | 2009-04-01T16:53:41Z | 706,506 | <pre><code>xmldoc = minidom.parse('your.xml')
matchingNodes = [node for node in xmldoc.getElementsByTagName("id") if node.nodeValue == '345754']
</code></pre>
<p>See also:</p>
<ul>
<li><a href="http://stackoverflow.com/questions/666724/how-to-get-whole-text-of-an-element-in-xml-minidom">http://stackoverflow.com/quest... | 4 | 2009-04-01T17:09:03Z | [
"python",
"xml",
"minidom"
] |
Python: Using minidom to search for nodes with a certain text | 706,453 | <p>I am currently faced with XML that looks like this:</p>
<pre><code><ID>345754</ID>
</code></pre>
<p>This is contained within a hierarchy. I have parsed the xml, and wish to find the ID node by searching on "345754".</p>
| 1 | 2009-04-01T16:53:41Z | 3,044,575 | <p>vartec's answer needs correcting (sorry I'm not sure I can do that), it should read:</p>
<pre><code>xmldoc = xml.dom.minidom.parse('your.xml')
matchingNodes = [node for node in xmldoc.getElementsByTagName("ID") if
node.firstChild.nodeValue == '345754']
</code></pre>
<p>Two things were wrong with it: (i) tag names... | 7 | 2010-06-15T11:11:51Z | [
"python",
"xml",
"minidom"
] |
Can you define aliases for imported modules in Python? | 706,595 | <p>In Python, is it possible to define an alias for an imported module?</p>
<p>For instance:</p>
<pre><code>import a_ridiculously_long_module_name
</code></pre>
<p>...so that is has an alias of 'short_name'.</p>
| 59 | 2009-04-01T17:33:02Z | 706,601 | <pre><code>import a_ridiculously_long_module_name as short_name
</code></pre>
<p>also works for</p>
<pre><code>import module.submodule.subsubmodule as short_name
</code></pre>
| 88 | 2009-04-01T17:34:00Z | [
"python",
"module",
"alias",
"python-import"
] |
Can you define aliases for imported modules in Python? | 706,595 | <p>In Python, is it possible to define an alias for an imported module?</p>
<p>For instance:</p>
<pre><code>import a_ridiculously_long_module_name
</code></pre>
<p>...so that is has an alias of 'short_name'.</p>
| 59 | 2009-04-01T17:33:02Z | 706,602 | <p><a href="http://docs.python.org/reference/simple%5Fstmts.html#import">Check here</a></p>
<pre><code>import module as name
</code></pre>
<p>or</p>
<pre><code>from relative_module import identifier as name
</code></pre>
| 22 | 2009-04-01T17:34:03Z | [
"python",
"module",
"alias",
"python-import"
] |
Can you define aliases for imported modules in Python? | 706,595 | <p>In Python, is it possible to define an alias for an imported module?</p>
<p>For instance:</p>
<pre><code>import a_ridiculously_long_module_name
</code></pre>
<p>...so that is has an alias of 'short_name'.</p>
| 59 | 2009-04-01T17:33:02Z | 707,571 | <p>If you've done:</p>
<pre><code>import long_module_name
</code></pre>
<p>you can also give it an alias by:</p>
<pre><code>lmn = long_module_name
</code></pre>
<p>There's no reason to do it this way in code, but I sometimes find it useful in the interactive interpreter.</p>
| 19 | 2009-04-01T22:22:14Z | [
"python",
"module",
"alias",
"python-import"
] |
How do I pass a method as a parameter in python | 706,721 | <p>Is it possible to pass a method as a parameter to a method?</p>
<pre><code>self.method2(self.method1)
def method1(self):
return 'hello world'
def method2(self, methodToRun):
result = methodToRun.call()
return result
</code></pre>
| 31 | 2009-04-01T18:06:53Z | 706,735 | <p>Yes it is, just use the name of the method, as you have written. Methods/functions are objects in Python, just like anything else, and you can pass them around the way you do variables. In fact, you can think about a method (or function) as a variable whose value is the actual callable code object.</p>
<p>FYI, ther... | 52 | 2009-04-01T18:09:03Z | [
"python"
] |
How do I pass a method as a parameter in python | 706,721 | <p>Is it possible to pass a method as a parameter to a method?</p>
<pre><code>self.method2(self.method1)
def method1(self):
return 'hello world'
def method2(self, methodToRun):
result = methodToRun.call()
return result
</code></pre>
| 31 | 2009-04-01T18:06:53Z | 706,743 | <p>Yes it is possible. Just call it:</p>
<pre><code>class Foo(object):
def method1(self):
pass
def method2(self, method):
return method()
foo = Foo()
foo.method2(foo.method1)
</code></pre>
| 10 | 2009-04-01T18:11:42Z | [
"python"
] |
How do I pass a method as a parameter in python | 706,721 | <p>Is it possible to pass a method as a parameter to a method?</p>
<pre><code>self.method2(self.method1)
def method1(self):
return 'hello world'
def method2(self, methodToRun):
result = methodToRun.call()
return result
</code></pre>
| 31 | 2009-04-01T18:06:53Z | 706,744 | <p>Yes; functions (and methods) are first class objects in Python. The following works:</p>
<pre><code>def foo(f):
print "Running parameter f()."
f()
def bar():
print "In bar()."
foo(bar)
</code></pre>
<p>Outputs:</p>
<pre><code>Running parameter f().
In bar().
</code></pre>
<p>These sorts of question... | 4 | 2009-04-01T18:11:47Z | [
"python"
] |
How do I pass a method as a parameter in python | 706,721 | <p>Is it possible to pass a method as a parameter to a method?</p>
<pre><code>self.method2(self.method1)
def method1(self):
return 'hello world'
def method2(self, methodToRun):
result = methodToRun.call()
return result
</code></pre>
| 31 | 2009-04-01T18:06:53Z | 706,749 | <p>Here is your example re-written to show a stand-alone working example:</p>
<pre><code>class Test:
def method1(self):
return 'hello world'
def method2(self, methodToRun):
result = methodToRun()
return result
def method3(self):
return self.method2(self.method1)
test = Te... | 2 | 2009-04-01T18:13:07Z | [
"python"
] |
How do I pass a method as a parameter in python | 706,721 | <p>Is it possible to pass a method as a parameter to a method?</p>
<pre><code>self.method2(self.method1)
def method1(self):
return 'hello world'
def method2(self, methodToRun):
result = methodToRun.call()
return result
</code></pre>
| 31 | 2009-04-01T18:06:53Z | 706,757 | <p>Methods are objects like any other. So you can pass them around, store them in lists and dicts, do whatever you like with them. The special thing about them is they are callable objects so you can invoke <code>__call__</code> on them. <code>__call__</code> gets called automatically when you invoke the method with or... | 2 | 2009-04-01T18:14:52Z | [
"python"
] |
How do you safely and efficiently get the row id after an insert with mysql using MySQLdb in python? | 706,755 | <p>I have a simple table in mysql with the following fields:</p>
<ul>
<li>id -- Primary key, int, autoincrement</li>
<li>name -- varchar(50)</li>
<li>description -- varchar(256)</li>
</ul>
<p>Using MySQLdb, a python module, I want to insert a name and description into the table, and get back the id. </p>
<p>In pseud... | 15 | 2009-04-01T18:14:27Z | 706,770 | <p>I think it might be</p>
<pre><code>newID = db.insert_id()
</code></pre>
<p><hr /></p>
<p><strong>Edit by Original Poster</strong></p>
<p>Turns out, in the version of MySQLdb that I am using (1.2.2)
You would do the following:</p>
<pre><code>conn = MySQLdb(host...)
c = conn.cursor()
c.execute("INSERT INTO...")
... | 27 | 2009-04-01T18:18:08Z | [
"python",
"mysql"
] |
How do you safely and efficiently get the row id after an insert with mysql using MySQLdb in python? | 706,755 | <p>I have a simple table in mysql with the following fields:</p>
<ul>
<li>id -- Primary key, int, autoincrement</li>
<li>name -- varchar(50)</li>
<li>description -- varchar(256)</li>
</ul>
<p>Using MySQLdb, a python module, I want to insert a name and description into the table, and get back the id. </p>
<p>In pseud... | 15 | 2009-04-01T18:14:27Z | 706,772 | <p>The easiest way of all is to wrap your insert with a select count query into a single stored procedure and call that in your code. You would pass in the parameters needed to the stored procedure and it would then select your row count.</p>
| -6 | 2009-04-01T18:18:29Z | [
"python",
"mysql"
] |
How do you safely and efficiently get the row id after an insert with mysql using MySQLdb in python? | 706,755 | <p>I have a simple table in mysql with the following fields:</p>
<ul>
<li>id -- Primary key, int, autoincrement</li>
<li>name -- varchar(50)</li>
<li>description -- varchar(256)</li>
</ul>
<p>Using MySQLdb, a python module, I want to insert a name and description into the table, and get back the id. </p>
<p>In pseud... | 15 | 2009-04-01T18:14:27Z | 706,965 | <p>I don't know if there's a MySQLdb specific API for this, but in general you can obtain the last inserted id by <a href="http://dev.mysql.com/doc/refman/5.0/en/getting-unique-id.html" rel="nofollow">SELECTing LAST_INSERT_ID()</a></p>
<p>It is on a per-connection basis, so you don't risk race conditions if some other... | 1 | 2009-04-01T19:14:59Z | [
"python",
"mysql"
] |
How do you safely and efficiently get the row id after an insert with mysql using MySQLdb in python? | 706,755 | <p>I have a simple table in mysql with the following fields:</p>
<ul>
<li>id -- Primary key, int, autoincrement</li>
<li>name -- varchar(50)</li>
<li>description -- varchar(256)</li>
</ul>
<p>Using MySQLdb, a python module, I want to insert a name and description into the table, and get back the id. </p>
<p>In pseud... | 15 | 2009-04-01T18:14:27Z | 5,225,970 | <p>You could also do a </p>
<p><code>conn.insert_id</code></p>
| 0 | 2011-03-07T22:19:48Z | [
"python",
"mysql"
] |
What is the best way to pass a method (with parameters) to another method in python | 706,813 | <p>What's the best way to pass a method and a method parameter to another method?</p>
<p>Is there a better way to do the following?</p>
<pre><code>def method1(name)
return 'Hello ' + name
def method2(methodToCall, methodToCallParams, question):
greetings = methodToCall(methodToCallParams)
return greeting... | 2 | 2009-04-01T18:31:10Z | 706,841 | <p>You're thinking of currying, where you bind a function and arguments together to be called later. Usually currying is used so that you can add additional arguments at the time the function is actually called.</p>
<p>Rather than re-write the wheel, here's a link to an example: <a href="http://code.activestate.com/re... | 0 | 2009-04-01T18:37:44Z | [
"python"
] |
What is the best way to pass a method (with parameters) to another method in python | 706,813 | <p>What's the best way to pass a method and a method parameter to another method?</p>
<p>Is there a better way to do the following?</p>
<pre><code>def method1(name)
return 'Hello ' + name
def method2(methodToCall, methodToCallParams, question):
greetings = methodToCall(methodToCallParams)
return greeting... | 2 | 2009-04-01T18:31:10Z | 706,864 | <p>If you want to package the invocation up in one hit, you can use the functools module:</p>
<pre><code>from functools import partial
def some_function(param_one, param_two):
print "Param One: %s" % param_one
print "Param Two: %s" % param_two
def calling_function(target):
target()
calling_function(part... | 11 | 2009-04-01T18:43:55Z | [
"python"
] |
What is the best way to pass a method (with parameters) to another method in python | 706,813 | <p>What's the best way to pass a method and a method parameter to another method?</p>
<p>Is there a better way to do the following?</p>
<pre><code>def method1(name)
return 'Hello ' + name
def method2(methodToCall, methodToCallParams, question):
greetings = methodToCall(methodToCallParams)
return greeting... | 2 | 2009-04-01T18:31:10Z | 706,876 | <p>You could do it this way:</p>
<pre><code>def method1(name):
def wrapper():
return 'Hello ' + name
return wrapper
def method2(method, question):
output = method()
return output + ', ' + question
method2(method1(name = 'Sam'), 'How are you?')
</code></pre>
<p>You can of course pass some var... | 3 | 2009-04-01T18:46:52Z | [
"python"
] |
What is the best way to pass a method (with parameters) to another method in python | 706,813 | <p>What's the best way to pass a method and a method parameter to another method?</p>
<p>Is there a better way to do the following?</p>
<pre><code>def method1(name)
return 'Hello ' + name
def method2(methodToCall, methodToCallParams, question):
greetings = methodToCall(methodToCallParams)
return greeting... | 2 | 2009-04-01T18:31:10Z | 706,910 | <p>Another option, if you are working on a Python version pre 2.5 is to use a lambda as a closure:</p>
<pre><code>def some_func(bar):
print bar
def call_other(other):
other()
call_other(lambda param="foo": some_func(param))
</code></pre>
<p>HTH</p>
| 1 | 2009-04-01T18:56:09Z | [
"python"
] |
What is the best way to pass a method (with parameters) to another method in python | 706,813 | <p>What's the best way to pass a method and a method parameter to another method?</p>
<p>Is there a better way to do the following?</p>
<pre><code>def method1(name)
return 'Hello ' + name
def method2(methodToCall, methodToCallParams, question):
greetings = methodToCall(methodToCallParams)
return greeting... | 2 | 2009-04-01T18:31:10Z | 707,902 | <p>You can used <a href="http://docs.python.org/library/functools.html" rel="nofollow">functools.partial</a> to do this, as <a href="http://stackoverflow.com/questions/706813/what-is-the-best-way-to-pass-a-method-with-parameters-to-another-method-in-pyth/706864#706864">jkp pointed out</a></p>
<p>However, functools is ... | 2 | 2009-04-02T00:49:17Z | [
"python"
] |
How to call an external program in python and retrieve the output and return code? | 706,989 | <p>How can I call an external program with a python script and retrieve the output and return code?</p>
| 24 | 2009-04-01T19:25:10Z | 707,001 | <p>Look at the <a href="http://docs.python.org/library/subprocess.html"><strong>subprocess</strong></a> module: a simple example follows...</p>
<pre><code>from subprocess import Popen, PIPE
process = Popen(["ls", "-la", "."], stdout=PIPE)
(output, err) = process.communicate()
exit_code = process.wait()
</code></pre>
| 42 | 2009-04-01T19:28:30Z | [
"python",
"return-value",
"external-process"
] |
How to call an external program in python and retrieve the output and return code? | 706,989 | <p>How can I call an external program with a python script and retrieve the output and return code?</p>
| 24 | 2009-04-01T19:25:10Z | 707,007 | <p>Check out the subprocess module here: <a href="http://docs.python.org/library/subprocess.html#module-subprocess" rel="nofollow">http://docs.python.org/library/subprocess.html#module-subprocess</a>. It should get what you need done.</p>
| 2 | 2009-04-01T19:30:23Z | [
"python",
"return-value",
"external-process"
] |
How to call an external program in python and retrieve the output and return code? | 706,989 | <p>How can I call an external program with a python script and retrieve the output and return code?</p>
| 24 | 2009-04-01T19:25:10Z | 15,190,186 | <p>Following Ambroz Bizjak's previous comment, here is a solution that worked for me:</p>
<pre><code>import shlex
from subprocess import Popen, PIPE
cmd = "..."
process = Popen(shlex.split(cmd), stdout=PIPE)
process.communicate()
exit_code = process.wait()
</code></pre>
| 12 | 2013-03-03T20:00:32Z | [
"python",
"return-value",
"external-process"
] |
How to call an external program in python and retrieve the output and return code? | 706,989 | <p>How can I call an external program with a python script and retrieve the output and return code?</p>
| 24 | 2009-04-01T19:25:10Z | 22,395,319 | <p>After some research, I have the following code which works very well for me. It basically prints both stdout and stderr in real time. Hope it helps someone else who needs it.</p>
<pre><code>stdout_result = 1
stderr_result = 1
def stdout_thread(pipe):
global stdout_result
while True:
out = pipe.std... | 0 | 2014-03-14T02:57:53Z | [
"python",
"return-value",
"external-process"
] |
How to call an external program in python and retrieve the output and return code? | 706,989 | <p>How can I call an external program with a python script and retrieve the output and return code?</p>
| 24 | 2009-04-01T19:25:10Z | 25,238,705 | <p>I've developed a little library (<a href="https://pypi.python.org/pypi/py-execute/" rel="nofollow">py-execute</a>) that allows you to execute external programs, retrieve the output and the retcode and, at the same time get output in console in real time:</p>
<pre><code>>>> from py_execute.process_executor ... | 1 | 2014-08-11T08:19:53Z | [
"python",
"return-value",
"external-process"
] |
Is there a Perl equivalent to Python's `if __name__ == '__main__'`? | 707,022 | <p>Is there a way to determine if the current file is the one being executed in Perl source? In Python we do this with the following construct:</p>
<pre><code>if __name__ == '__main__':
# This file is being executed.
raise NotImplementedError
</code></pre>
<p>I can hack something together using <code>FindBin<... | 28 | 2009-04-01T19:35:15Z | 707,034 | <pre><code>unless (caller) {
print "This is the script being executed\n";
}
</code></pre>
<p>See <a href="http://perldoc.perl.org/functions/caller.html">caller</a>. It returns <code>undef</code> in the main script. Note that that doesn't work inside a subroutine, only in top-level code.</p>
| 39 | 2009-04-01T19:39:55Z | [
"python",
"perl",
"executable"
] |
Is there a Perl equivalent to Python's `if __name__ == '__main__'`? | 707,022 | <p>Is there a way to determine if the current file is the one being executed in Perl source? In Python we do this with the following construct:</p>
<pre><code>if __name__ == '__main__':
# This file is being executed.
raise NotImplementedError
</code></pre>
<p>I can hack something together using <code>FindBin<... | 28 | 2009-04-01T19:35:15Z | 707,045 | <p>See the "Subclasses for Applications (Chapter 18)" portion of <a href="http://stackoverflow.com/users/8817/brian-d-foy">brian d foy</a>'s article <a href="http://www.onlamp.com/pub/a/onlamp/2007/04/12/five-ways-to-improve-your-perl-programming.html">Five Ways to Improve Your Perl Programming</a>.</p>
| 9 | 2009-04-01T19:43:18Z | [
"python",
"perl",
"executable"
] |
Is there a Perl equivalent to Python's `if __name__ == '__main__'`? | 707,022 | <p>Is there a way to determine if the current file is the one being executed in Perl source? In Python we do this with the following construct:</p>
<pre><code>if __name__ == '__main__':
# This file is being executed.
raise NotImplementedError
</code></pre>
<p>I can hack something together using <code>FindBin<... | 28 | 2009-04-01T19:35:15Z | 710,075 | <p><code>unless caller</code> is good, but a more direct parallel, as well as a more <em>explicit check</em>, is: </p>
<pre><code>use English qw<$PROGRAM_NAME>;
if ( $PROGRAM_NAME eq __FILE__ ) {
...
}
</code></pre>
<p>Just thought I'd put that out there.</p>
<p><strong>EDIT</strong> </p>
<p>Keep in mi... | 3 | 2009-04-02T15:00:16Z | [
"python",
"perl",
"executable"
] |
Connection refused on Windows XP network | 707,023 | <p>This is only marginally a programming problem and more of a networking problem.</p>
<p>I'm trying to get a Django web app to run in my home network and I can't get any machines on the network to get to the web page. I've run on ports 80 and 8000 with no luck. Error message is: "Firefox can't establish a connection ... | 0 | 2009-04-01T19:35:20Z | 707,048 | <p>I assume you're running the django dev server? If so, make sure you start it so that it will bind to the IP address the other machines need to use for the connection:</p>
<pre><code>python manage.py runserver 192.168.x.x:8000
</code></pre>
<p>You can ask the server to bind to all addresses with (haven't tried this... | 3 | 2009-04-01T19:45:10Z | [
"python",
"networking"
] |
Decorators and in class | 707,090 | <p>Is there any way to write decorators within a class structure that nest well? For example, this works fine without classes:</p>
<pre><code>def wrap1(func):
def loc(*args,**kwargs):
print 1
return func(*args,**kwargs)
return loc
def wrap2(func):
def loc(*args,**kwargs):
print 2
retu... | 3 | 2009-04-01T19:57:51Z | 707,137 | <p>"Is there any good way to put the decorators within the namespace?"</p>
<p>There's no compelling reason for this. You have module files. Those are a tidy container for a class and some decorators. </p>
<p>You don't ever need decorators as methods of the class -- you can just call one method from another. </p>
| 5 | 2009-04-01T20:07:40Z | [
"python",
"decorator"
] |
Decorators and in class | 707,090 | <p>Is there any way to write decorators within a class structure that nest well? For example, this works fine without classes:</p>
<pre><code>def wrap1(func):
def loc(*args,**kwargs):
print 1
return func(*args,**kwargs)
return loc
def wrap2(func):
def loc(*args,**kwargs):
print 2
retu... | 3 | 2009-04-01T19:57:51Z | 708,397 | <p>Actually, there should be no problem putting them all inside of a class. When inside of a class body, you can name any variable defined so far simply by naming it:</p>
<pre>
class A(object):
a = 1
b = 2
c = a + b
print A.c
</pre>
<p>That yields the result 3, because while Python is executing a class b... | 2 | 2009-04-02T05:22:22Z | [
"python",
"decorator"
] |
Python source header comment | 707,127 | <p>What is the line</p>
<pre><code>#!/usr/bin/env python
</code></pre>
<p>in the first line of a python script used for?</p>
| 8 | 2009-04-01T20:05:21Z | 707,142 | <p>Under UNIX and similar operating systems, this line tells which interpreter is to be used if the file is executed.</p>
| 5 | 2009-04-01T20:08:35Z | [
"python",
"unix",
"shebang"
] |
Python source header comment | 707,127 | <p>What is the line</p>
<pre><code>#!/usr/bin/env python
</code></pre>
<p>in the first line of a python script used for?</p>
| 8 | 2009-04-01T20:05:21Z | 707,146 | <p>This is called a <a href="http://en.wikipedia.org/wiki/Shebang%5F%28Unix%29" rel="nofollow">shebang</a> line:</p>
<blockquote>
<p>In computing, a shebang (also called a hashbang, hashpling, or pound bang) refers to the characters "#!" when they are the first two characters in a text file. Unix-like operating syst... | 14 | 2009-04-01T20:10:09Z | [
"python",
"unix",
"shebang"
] |
Python source header comment | 707,127 | <p>What is the line</p>
<pre><code>#!/usr/bin/env python
</code></pre>
<p>in the first line of a python script used for?</p>
| 8 | 2009-04-01T20:05:21Z | 707,148 | <p>'/usr/bin/env python' searches $PATH for python and runs it.</p>
<blockquote>
<p>Usually <strong>env</strong> is used to set some environment variables
for a program</p>
</blockquote>
<p>What that line does is tell your computer what to do with that file, if you simply try to run the file <strong>without speci... | 3 | 2009-04-01T20:10:20Z | [
"python",
"unix",
"shebang"
] |
Python source header comment | 707,127 | <p>What is the line</p>
<pre><code>#!/usr/bin/env python
</code></pre>
<p>in the first line of a python script used for?</p>
| 8 | 2009-04-01T20:05:21Z | 707,166 | <p>In UNIX and Linux this tells which binary to use as an interpreter (see also <a href="http://en.wikipedia.org/wiki/Shebang%5F%28Unix%29">Wiki page</a>).
For example shell script is interpreted by <code>/bin/sh</code>.</p>
<pre><code>#!/bin/sh
</code></pre>
<p>Now with python it's a bit tricky, because you can't as... | 24 | 2009-04-01T20:14:20Z | [
"python",
"unix",
"shebang"
] |
Python source header comment | 707,127 | <p>What is the line</p>
<pre><code>#!/usr/bin/env python
</code></pre>
<p>in the first line of a python script used for?</p>
| 8 | 2009-04-01T20:05:21Z | 707,167 | <p>As Andri said. In Windows, the executable to run a file with when launched from the command line relies on an association:</p>
<pre><code>16:12:40.68 C:\>assoc .py
.py=Python.File
16:13:53.45 C:\>assoc Python.File
Python.File=Python File
16:14:01.70 C:\>ftype Python.File
Python.File="C:\Python30\python.e... | 5 | 2009-04-01T20:15:29Z | [
"python",
"unix",
"shebang"
] |
Python source header comment | 707,127 | <p>What is the line</p>
<pre><code>#!/usr/bin/env python
</code></pre>
<p>in the first line of a python script used for?</p>
| 8 | 2009-04-01T20:05:21Z | 707,291 | <p>Just a note, this line is nothing more then a comment to the interpreter <strong>in Windows</strong>. </p>
| 2 | 2009-04-01T20:52:34Z | [
"python",
"unix",
"shebang"
] |
Create a standalone windows exe which does not require pythonXX.dll | 707,242 | <p>is there a way to create a standalone .exe from a python script.
Executables generated with py2exe can run only with pythonXX.dll.
I'd like to obtain a fully standalone .exe which does not require to install the python runtime library.
It looks like a linking problem but using static library instead the dynamic one ... | 16 | 2009-04-01T20:38:16Z | 707,261 | <p>This is not the best way to do it, but you might consider using executable SFX Archive with both the .exe and .dll files inside, and setting it to execute your .exe file when it's double clicked.</p>
| 1 | 2009-04-01T20:44:20Z | [
"python",
"windows",
"py2exe"
] |
Create a standalone windows exe which does not require pythonXX.dll | 707,242 | <p>is there a way to create a standalone .exe from a python script.
Executables generated with py2exe can run only with pythonXX.dll.
I'd like to obtain a fully standalone .exe which does not require to install the python runtime library.
It looks like a linking problem but using static library instead the dynamic one ... | 16 | 2009-04-01T20:38:16Z | 707,274 | <p>You can do this in the latest version of py2exe... <br>Just add something like the code below in your <code>setup.py</code> file (key part is 'bundle_files': 1).</p>
<p>To include your TkInter package in the install, use the 'includes' key.</p>
<pre><code>distutils.core.setup(
windows=[
{'script'... | 17 | 2009-04-01T20:48:40Z | [
"python",
"windows",
"py2exe"
] |
Create a standalone windows exe which does not require pythonXX.dll | 707,242 | <p>is there a way to create a standalone .exe from a python script.
Executables generated with py2exe can run only with pythonXX.dll.
I'd like to obtain a fully standalone .exe which does not require to install the python runtime library.
It looks like a linking problem but using static library instead the dynamic one ... | 16 | 2009-04-01T20:38:16Z | 707,310 | <p>Due to how Windows' dynamic linker works you cannot use the static library if you use .pyd or .dll Python modules; DLLs loaded in Windows do not automatically share their symbol space with the executable and so require a separate DLL containing the Python symbols.</p>
| 5 | 2009-04-01T20:56:55Z | [
"python",
"windows",
"py2exe"
] |
Create a standalone windows exe which does not require pythonXX.dll | 707,242 | <p>is there a way to create a standalone .exe from a python script.
Executables generated with py2exe can run only with pythonXX.dll.
I'd like to obtain a fully standalone .exe which does not require to install the python runtime library.
It looks like a linking problem but using static library instead the dynamic one ... | 16 | 2009-04-01T20:38:16Z | 708,232 | <p>Another solution is to create a single exe with python and all your dependencies installed inside of it, including the python.dll. There's a bit of magic in the wrapper, but it just works. The details are here: </p>
<p><a href="http://code.google.com/p/pylunch/downloads/detail?name=PyLunch-0.2.pdf" rel="nofollow">... | 2 | 2009-04-02T03:55:42Z | [
"python",
"windows",
"py2exe"
] |
Create a standalone windows exe which does not require pythonXX.dll | 707,242 | <p>is there a way to create a standalone .exe from a python script.
Executables generated with py2exe can run only with pythonXX.dll.
I'd like to obtain a fully standalone .exe which does not require to install the python runtime library.
It looks like a linking problem but using static library instead the dynamic one ... | 16 | 2009-04-01T20:38:16Z | 709,027 | <p>If your purpose of having a single executable is to ease downloading/emailing, etc., I've solved this by bundling the py2exe output using <a href="http://www.jrsoftware.org/isinfo.php" rel="nofollow">Inno Setup</a>. This is actually better than having a single executable, because rather than providing an executable ... | 4 | 2009-04-02T09:43:20Z | [
"python",
"windows",
"py2exe"
] |
In Python how can I access "static" class variables within class methods | 707,380 | <p>If I have the following python code:</p>
<pre><code>class Foo(object):
bar = 1
def bah(self):
print bar
f = Foo()
f.bah()
</code></pre>
<p>It complains </p>
<pre><code>NameError: global name 'bar' is not defined
</code></pre>
<p>How can I access class/static variable 'bar' within method 'bah'?<... | 61 | 2009-04-01T21:23:39Z | 707,389 | <p>Instead of <code>bar</code> use <code>self.bar</code> or <code>Foo.bar</code>. Assigning to <code>Foo.bar</code> will create a static variable, and assigning to <code>self.bar</code> will create an instance variable.</p>
| 66 | 2009-04-01T21:25:28Z | [
"python"
] |
In Python how can I access "static" class variables within class methods | 707,380 | <p>If I have the following python code:</p>
<pre><code>class Foo(object):
bar = 1
def bah(self):
print bar
f = Foo()
f.bah()
</code></pre>
<p>It complains </p>
<pre><code>NameError: global name 'bar' is not defined
</code></pre>
<p>How can I access class/static variable 'bar' within method 'bah'?<... | 61 | 2009-04-01T21:23:39Z | 708,381 | <p>As with all good examples, you've simplified what you're actually trying to do. This is good, but it is worth noting that python has a <em>lot</em> of flexibility when it comes to class versus instance variables. The same can be said of methods. For a good list of possibilities, I recommend reading <a href="http:/... | 8 | 2009-04-02T05:13:03Z | [
"python"
] |
In Python how can I access "static" class variables within class methods | 707,380 | <p>If I have the following python code:</p>
<pre><code>class Foo(object):
bar = 1
def bah(self):
print bar
f = Foo()
f.bah()
</code></pre>
<p>It complains </p>
<pre><code>NameError: global name 'bar' is not defined
</code></pre>
<p>How can I access class/static variable 'bar' within method 'bah'?<... | 61 | 2009-04-01T21:23:39Z | 709,024 | <p>Define class method:</p>
<pre><code>class Foo(object):
bar = 1
@classmethod
def bah(cls):
print cls.bar
</code></pre>
<p>Now if <code>bah()</code> has to be instance method (i.e. have access to self), you can still directly access the class variable.</p>
<pre><code>class Foo(object):
b... | 46 | 2009-04-02T09:42:57Z | [
"python"
] |
questions re: current state of GUI programming with Python | 707,491 | <p>I recently did some work modifying a Python gui app that was using wxPython widgets. I've experimented with Python in fits and starts over last six or seven years, but this was the first time I did any work with a gui. I was pretty disappointed at what seems to be the current state of gui programming with Python. ... | 20 | 2009-04-01T21:53:15Z | 707,543 | <p>seems your complains are about wxPython, not about Python itself. try pyQt (or is it qtPython?)</p>
<p>but, both wxPython and pyQt are just Python bindings to a C / C++ (respectively) library, it's just as (conceptually) low level as the originals.</p>
<p>but, Qt is far superior to wx</p>
| 12 | 2009-04-01T22:09:32Z | [
"python",
"user-interface"
] |
questions re: current state of GUI programming with Python | 707,491 | <p>I recently did some work modifying a Python gui app that was using wxPython widgets. I've experimented with Python in fits and starts over last six or seven years, but this was the first time I did any work with a gui. I was pretty disappointed at what seems to be the current state of gui programming with Python. ... | 20 | 2009-04-01T21:53:15Z | 707,555 | <p>You may want to look at Jython (Python on the Java VM). It is very similar to Iron Python, and you can fore go the .Net koolaid.</p>
| 3 | 2009-04-01T22:14:35Z | [
"python",
"user-interface"
] |
questions re: current state of GUI programming with Python | 707,491 | <p>I recently did some work modifying a Python gui app that was using wxPython widgets. I've experimented with Python in fits and starts over last six or seven years, but this was the first time I did any work with a gui. I was pretty disappointed at what seems to be the current state of gui programming with Python. ... | 20 | 2009-04-01T21:53:15Z | 707,590 | <p>You're probably going to have to use the .net or java pythons, but check this out first and see if it meets your requirements:</p>
<p><a href="http://www.async.com.br/projects/kiwi/" rel="nofollow">Kiwi</a></p>
| 2 | 2009-04-01T22:26:37Z | [
"python",
"user-interface"
] |
questions re: current state of GUI programming with Python | 707,491 | <p>I recently did some work modifying a Python gui app that was using wxPython widgets. I've experimented with Python in fits and starts over last six or seven years, but this was the first time I did any work with a gui. I was pretty disappointed at what seems to be the current state of gui programming with Python. ... | 20 | 2009-04-01T21:53:15Z | 707,718 | <p>You are right, wxPython can definetely be improved. But i think Robin Dunn has done a great job so far, and still is. </p>
<p>Especially the wxPython community is open to improvements, like recent inclusion of the widgets by <a href="http://xoomer.virgilio.it/infinity77/main/freeware.html" rel="nofollow">Andrea</a>... | 0 | 2009-04-01T23:20:23Z | [
"python",
"user-interface"
] |
questions re: current state of GUI programming with Python | 707,491 | <p>I recently did some work modifying a Python gui app that was using wxPython widgets. I've experimented with Python in fits and starts over last six or seven years, but this was the first time I did any work with a gui. I was pretty disappointed at what seems to be the current state of gui programming with Python. ... | 20 | 2009-04-01T21:53:15Z | 707,850 | <p>PyQt is a binding to Qt SDK from Nokia, and PyQt itself is delivered by a company called <a href="http://www.riverbankcomputing.co.uk/news">RiverBank</a>.</p>
<p>If licence is not important for you you can use PyQt under GPL or you 'll pay some money for commercial licence.</p>
<p>PyQt is binding Qt 4.4 right now.... | 5 | 2009-04-02T00:17:59Z | [
"python",
"user-interface"
] |
questions re: current state of GUI programming with Python | 707,491 | <p>I recently did some work modifying a Python gui app that was using wxPython widgets. I've experimented with Python in fits and starts over last six or seven years, but this was the first time I did any work with a gui. I was pretty disappointed at what seems to be the current state of gui programming with Python. ... | 20 | 2009-04-01T21:53:15Z | 708,022 | <p>We've been quite happy using Python.Net to build our UIs in WinForms and using CPython for Presenter, Model. IronPython is also a good tool if you want to do python on Windows.</p>
| 0 | 2009-04-02T01:56:36Z | [
"python",
"user-interface"
] |
questions re: current state of GUI programming with Python | 707,491 | <p>I recently did some work modifying a Python gui app that was using wxPython widgets. I've experimented with Python in fits and starts over last six or seven years, but this was the first time I did any work with a gui. I was pretty disappointed at what seems to be the current state of gui programming with Python. ... | 20 | 2009-04-01T21:53:15Z | 710,915 | <p>There is <a href="http://wiki.wxpython.org/Wax" rel="nofollow">Wax</a>, whose purpose was to create a more pythonic interface to wxWidgets, but it seems its development has stalled.</p>
| 0 | 2009-04-02T18:09:32Z | [
"python",
"user-interface"
] |
questions re: current state of GUI programming with Python | 707,491 | <p>I recently did some work modifying a Python gui app that was using wxPython widgets. I've experimented with Python in fits and starts over last six or seven years, but this was the first time I did any work with a gui. I was pretty disappointed at what seems to be the current state of gui programming with Python. ... | 20 | 2009-04-01T21:53:15Z | 711,396 | <p>Short answer: Don't try Tkinter - it's got all the problems described above.</p>
<p>Long answer: Tkinter is not useful for large programs. Handling the various pieces with it somehow invariably degenerates to juggling (which never happens otherwise) and the resulting output doesn't look native or particularly polis... | 2 | 2009-04-02T20:08:12Z | [
"python",
"user-interface"
] |
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