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 |
|---|---|---|---|---|---|---|---|---|---|
Get last n lines of a file with Python, similar to tail | 136,168 | <p>I'm writing a log file viewer for a web application and for that I want to paginate through the lines of the log file. The items in the file are line based with the newest item on the bottom.</p>
<p>So I need a <code>tail()</code> method that can read <code>n</code> lines from the bottom and supports an offset. W... | 122 | 2008-09-25T21:11:11Z | 4,751,601 | <p>Based on Eyecue answer (Jun 10 '10 at 21:28): this class add head() and tail() method to file object.</p>
<pre><code>class File(file):
def head(self, lines_2find=1):
self.seek(0) #Rewind file
return [self.next() for x in xrange(lines_2find)]
def tail(self, lines_2... | 1 | 2011-01-20T19:29:37Z | [
"python",
"file",
"file-io",
"tail",
"logfiles"
] |
Get last n lines of a file with Python, similar to tail | 136,168 | <p>I'm writing a log file viewer for a web application and for that I want to paginate through the lines of the log file. The items in the file are line based with the newest item on the bottom.</p>
<p>So I need a <code>tail()</code> method that can read <code>n</code> lines from the bottom and supports an offset. W... | 122 | 2008-09-25T21:11:11Z | 5,638,389 | <p>Several of these solutions have issues if the file doesn't end in \n or in ensuring the complete first line is read.</p>
<pre><code>def tail(file, n=1, bs=1024):
f = open(file)
f.seek(-1,2)
l = 1-f.read(1).count('\n') # If file doesn't end in \n, count it anyway.
B = f.tell()
while n >= l and... | 1 | 2011-04-12T16:14:42Z | [
"python",
"file",
"file-io",
"tail",
"logfiles"
] |
Get last n lines of a file with Python, similar to tail | 136,168 | <p>I'm writing a log file viewer for a web application and for that I want to paginate through the lines of the log file. The items in the file are line based with the newest item on the bottom.</p>
<p>So I need a <code>tail()</code> method that can read <code>n</code> lines from the bottom and supports an offset. W... | 122 | 2008-09-25T21:11:11Z | 6,813,975 | <p>Simple and fast solution with mmap:</p>
<pre><code>import mmap
import os
def tail(filename, n):
"""Returns last n lines from the filename. No exception handling"""
size = os.path.getsize(filename)
with open(filename, "rb") as f:
# for Windows the mmap parameters are different
fm = mmap.... | 11 | 2011-07-25T09:18:10Z | [
"python",
"file",
"file-io",
"tail",
"logfiles"
] |
Get last n lines of a file with Python, similar to tail | 136,168 | <p>I'm writing a log file viewer for a web application and for that I want to paginate through the lines of the log file. The items in the file are line based with the newest item on the bottom.</p>
<p>So I need a <code>tail()</code> method that can read <code>n</code> lines from the bottom and supports an offset. W... | 122 | 2008-09-25T21:11:11Z | 7,047,765 | <p>S.Lott's answer above almost works for me but ends up giving me partial lines. It turns out that it corrupts data on block boundaries because data holds the read blocks in reversed order. When ''.join(data) is called, the blocks are in the wrong order. This fixes that.</p>
<pre><code>def tail(f, window=20):
"""... | 18 | 2011-08-13T00:43:38Z | [
"python",
"file",
"file-io",
"tail",
"logfiles"
] |
Get last n lines of a file with Python, similar to tail | 136,168 | <p>I'm writing a log file viewer for a web application and for that I want to paginate through the lines of the log file. The items in the file are line based with the newest item on the bottom.</p>
<p>So I need a <code>tail()</code> method that can read <code>n</code> lines from the bottom and supports an offset. W... | 122 | 2008-09-25T21:11:11Z | 10,175,048 | <p>I found the Popen above to be the best solution. It's quick and dirty and it works
For python 2.6 on Unix machine i used the following</p>
<pre><code> def GetLastNLines(self, n, fileName):
"""
Name: Get LastNLines
Description: Gets last n lines using Unix tail
Output: ret... | 4 | 2012-04-16T13:26:32Z | [
"python",
"file",
"file-io",
"tail",
"logfiles"
] |
Get last n lines of a file with Python, similar to tail | 136,168 | <p>I'm writing a log file viewer for a web application and for that I want to paginate through the lines of the log file. The items in the file are line based with the newest item on the bottom.</p>
<p>So I need a <code>tail()</code> method that can read <code>n</code> lines from the bottom and supports an offset. W... | 122 | 2008-09-25T21:11:11Z | 12,762,551 | <p>There are some existing implementations of tail on pypi which you can install using pip: </p>
<ul>
<li>mtFileUtil</li>
<li>multitail</li>
<li>log4tailer</li>
<li>...</li>
</ul>
<p>Depending on your situation, there may be advantages to using one of these existing tools.</p>
| 1 | 2012-10-06T18:23:37Z | [
"python",
"file",
"file-io",
"tail",
"logfiles"
] |
Get last n lines of a file with Python, similar to tail | 136,168 | <p>I'm writing a log file viewer for a web application and for that I want to paginate through the lines of the log file. The items in the file are line based with the newest item on the bottom.</p>
<p>So I need a <code>tail()</code> method that can read <code>n</code> lines from the bottom and supports an offset. W... | 122 | 2008-09-25T21:11:11Z | 13,790,289 | <p>Here is my answer. Pure python. Using timeit it seems pretty fast. Tailing 100 lines of a log file that has 100,000 lines:</p>
<pre><code>>>> timeit.timeit('tail.tail(f, 100, 4098)', 'import tail; f = open("log.txt", "r");', number=10)
0.0014600753784179688
>>> timeit.timeit('tail.tail(f, 100, 409... | 10 | 2012-12-09T18:21:42Z | [
"python",
"file",
"file-io",
"tail",
"logfiles"
] |
Get last n lines of a file with Python, similar to tail | 136,168 | <p>I'm writing a log file viewer for a web application and for that I want to paginate through the lines of the log file. The items in the file are line based with the newest item on the bottom.</p>
<p>So I need a <code>tail()</code> method that can read <code>n</code> lines from the bottom and supports an offset. W... | 122 | 2008-09-25T21:11:11Z | 16,507,215 | <p>I had to read a specific value from the last line of a file, and stumbled upon this thread. Rather than reinventing the wheel in Python, I ended up with a tiny shell script, saved as
/usr/local/bin/get_last_netp:</p>
<pre><code>#! /bin/bash
tail -n1 /home/leif/projects/transfer/export.log | awk {'print $14'}
</code... | 1 | 2013-05-12T12:11:01Z | [
"python",
"file",
"file-io",
"tail",
"logfiles"
] |
Get last n lines of a file with Python, similar to tail | 136,168 | <p>I'm writing a log file viewer for a web application and for that I want to paginate through the lines of the log file. The items in the file are line based with the newest item on the bottom.</p>
<p>So I need a <code>tail()</code> method that can read <code>n</code> lines from the bottom and supports an offset. W... | 122 | 2008-09-25T21:11:11Z | 16,507,435 | <p>Not the first example using a deque, but a simpler one. This one is general: it works on any iterable object, not just a file.</p>
<pre><code>#!/usr/bin/env python
import sys
import collections
def tail(iterable, N):
deq = collections.deque()
for thing in iterable:
if len(deq) >= N:
... | 0 | 2013-05-12T12:38:55Z | [
"python",
"file",
"file-io",
"tail",
"logfiles"
] |
Get last n lines of a file with Python, similar to tail | 136,168 | <p>I'm writing a log file viewer for a web application and for that I want to paginate through the lines of the log file. The items in the file are line based with the newest item on the bottom.</p>
<p>So I need a <code>tail()</code> method that can read <code>n</code> lines from the bottom and supports an offset. W... | 122 | 2008-09-25T21:11:11Z | 23,290,416 | <pre><code>This is my version of tailf
import sys, time, os
filename = 'path to file'
try:
with open(filename) as f:
size = os.path.getsize(filename)
if size < 1024:
s = size
else:
s = 999
f.seek(-s, 2)
l = f.read()
print l
while ... | 0 | 2014-04-25T10:24:36Z | [
"python",
"file",
"file-io",
"tail",
"logfiles"
] |
Get last n lines of a file with Python, similar to tail | 136,168 | <p>I'm writing a log file viewer for a web application and for that I want to paginate through the lines of the log file. The items in the file are line based with the newest item on the bottom.</p>
<p>So I need a <code>tail()</code> method that can read <code>n</code> lines from the bottom and supports an offset. W... | 122 | 2008-09-25T21:11:11Z | 25,450,971 | <pre><code>import time
attemps = 600
wait_sec = 5
fname = "YOUR_PATH"
with open(fname, "r") as f:
where = f.tell()
for i in range(attemps):
line = f.readline()
if not line:
time.sleep(wait_sec)
f.seek(where)
else:
print line, # already has newline
</... | 0 | 2014-08-22T15:52:53Z | [
"python",
"file",
"file-io",
"tail",
"logfiles"
] |
Get last n lines of a file with Python, similar to tail | 136,168 | <p>I'm writing a log file viewer for a web application and for that I want to paginate through the lines of the log file. The items in the file are line based with the newest item on the bottom.</p>
<p>So I need a <code>tail()</code> method that can read <code>n</code> lines from the bottom and supports an offset. W... | 122 | 2008-09-25T21:11:11Z | 34,029,605 | <p>Posting an answer at the behest of commenters on <a href="/a/33811809/364696">my answer to a similar question</a> where the same technique was used to mutate the last line of a file, not just get it.</p>
<p>For a file of significant size, <a href="https://docs.python.org/3/library/mmap.html" rel="nofollow"><code>mm... | 2 | 2015-12-01T20:34:50Z | [
"python",
"file",
"file-io",
"tail",
"logfiles"
] |
Get last n lines of a file with Python, similar to tail | 136,168 | <p>I'm writing a log file viewer for a web application and for that I want to paginate through the lines of the log file. The items in the file are line based with the newest item on the bottom.</p>
<p>So I need a <code>tail()</code> method that can read <code>n</code> lines from the bottom and supports an offset. W... | 122 | 2008-09-25T21:11:11Z | 37,176,501 | <p>Although this isn't really on the efficient side with big files, this code is pretty straight-forward:<br></p>
<ol>
<li>It reads the file object, <code>f</code>.</li>
<li>It splits the string returned using newlines, <code>\n</code>.</li>
<li><p>It gets the array lists last indexes, using the negative sign to stand... | 0 | 2016-05-12T02:57:48Z | [
"python",
"file",
"file-io",
"tail",
"logfiles"
] |
Get last n lines of a file with Python, similar to tail | 136,168 | <p>I'm writing a log file viewer for a web application and for that I want to paginate through the lines of the log file. The items in the file are line based with the newest item on the bottom.</p>
<p>So I need a <code>tail()</code> method that can read <code>n</code> lines from the bottom and supports an offset. W... | 122 | 2008-09-25T21:11:11Z | 37,903,261 | <p>Here is a pretty simple implementation:</p>
<pre><code>with open('/etc/passwd', 'r') as f:
try:
f.seek(0,2)
s = ''
while s.count('\n') < 11:
cur = f.tell()
f.seek((cur - 10))
s = f.read(10) + s
f.seek((cur - 10))
print s
except Exception as e:
f.readlines()
</code>... | 0 | 2016-06-19T01:54:08Z | [
"python",
"file",
"file-io",
"tail",
"logfiles"
] |
How do you manage your custom modules? | 136,207 | <p>I write tons of python scripts, and I find myself reusing lots code that I've written for other projects. My solution has been to make sure the code is separated into logical modules/packages (this one's a given). I then make them setuptools-aware and publish them on PyPI. This allows my other scripts to always have... | 10 | 2008-09-25T21:18:09Z | 137,052 | <p>I have been doing the same thing. Extract common functionality, pretty the code up with extra documentation and unit tests/ doctests, create an easy_install setup.py, and then release on PyPi. Recently, I created a single <a href="http://code.google.com/p/7oars/" rel="nofollow">Google Code site</a> where I manage ... | 1 | 2008-09-26T00:13:02Z | [
"python",
"code-reuse"
] |
How do you manage your custom modules? | 136,207 | <p>I write tons of python scripts, and I find myself reusing lots code that I've written for other projects. My solution has been to make sure the code is separated into logical modules/packages (this one's a given). I then make them setuptools-aware and publish them on PyPI. This allows my other scripts to always have... | 10 | 2008-09-25T21:18:09Z | 137,291 | <p>What kind of modules are we talking about here? If you're planning on distributing your projects to other python developers, setuptools is great. But it's usually not a very good way to distribute apps to end users. Your best bet in the latter case is to tailor your packaging to the platforms you're distributing ... | 1 | 2008-09-26T01:39:58Z | [
"python",
"code-reuse"
] |
Key Presses in Python | 136,734 | <p>Is it possible to make it appear to a system that a key was pressed, for example I need to make <kbd>A</kbd> key be pressed thousands of times, and it is much to time consuming to do it manually, I would like to write something to do it for me, and the only thing I know well enough is Python.</p>
<p>A better way t... | 13 | 2008-09-25T22:58:01Z | 136,741 | <p>It's probably <em>possible</em> - but where do you want the key presses to go? To another application? That would probably be a case of understanding your platform's windowing toolkit and sending the right messages to the right window.</p>
<p>Clarify your requirements, and I'm sure we can help out.</p>
| 0 | 2008-09-25T22:59:55Z | [
"python",
"keypress"
] |
Key Presses in Python | 136,734 | <p>Is it possible to make it appear to a system that a key was pressed, for example I need to make <kbd>A</kbd> key be pressed thousands of times, and it is much to time consuming to do it manually, I would like to write something to do it for me, and the only thing I know well enough is Python.</p>
<p>A better way t... | 13 | 2008-09-25T22:58:01Z | 136,759 | <p><a href="http://www.autohotkey.com/" rel="nofollow">AutoHotKey</a> is perfect for this kind of tasks (keyboard automation / remapping)</p>
<p>Script to send "A" 100 times:</p>
<pre><code>Send {A 100}
</code></pre>
<p>That's all</p>
<p><strong>EDIT</strong>: to send the keys to an specific application:</p>
<pre>... | 5 | 2008-09-25T23:03:55Z | [
"python",
"keypress"
] |
Key Presses in Python | 136,734 | <p>Is it possible to make it appear to a system that a key was pressed, for example I need to make <kbd>A</kbd> key be pressed thousands of times, and it is much to time consuming to do it manually, I would like to write something to do it for me, and the only thing I know well enough is Python.</p>
<p>A better way t... | 13 | 2008-09-25T22:58:01Z | 136,780 | <p>Install the <a href="http://sourceforge.net/projects/pywin32/" rel="nofollow">pywin32</a> extensions. Then you can do the following:</p>
<pre><code>import win32com.client as comclt
wsh= comclt.Dispatch("WScript.Shell")
wsh.AppActivate("Notepad") # select another application
wsh.SendKeys("a") # send the keys you wan... | 17 | 2008-09-25T23:09:39Z | [
"python",
"keypress"
] |
Key Presses in Python | 136,734 | <p>Is it possible to make it appear to a system that a key was pressed, for example I need to make <kbd>A</kbd> key be pressed thousands of times, and it is much to time consuming to do it manually, I would like to write something to do it for me, and the only thing I know well enough is Python.</p>
<p>A better way t... | 13 | 2008-09-25T22:58:01Z | 136,786 | <p>If you're platform is Windows, I wouldn't actually recommend Python. Instead, look into <a href="http://www.autohotkey.com/" rel="nofollow">Autohotkey</a>. Trust me, I love Python, but in this circumstance a macro program is the ideal tool for the job. Autohotkey's scripting is only decent (in my opinion), but th... | -1 | 2008-09-25T23:12:13Z | [
"python",
"keypress"
] |
Key Presses in Python | 136,734 | <p>Is it possible to make it appear to a system that a key was pressed, for example I need to make <kbd>A</kbd> key be pressed thousands of times, and it is much to time consuming to do it manually, I would like to write something to do it for me, and the only thing I know well enough is Python.</p>
<p>A better way t... | 13 | 2008-09-25T22:58:01Z | 1,282,600 | <p>Alternative way to set prefer window into foreground before send key press event.</p>
<pre><code>hwnd = win32gui.FindWindowEx(0,0,0, "App title")
win32gui.SetForegroundWindow(hwnd)
</code></pre>
| 0 | 2009-08-15T19:16:47Z | [
"python",
"keypress"
] |
Key Presses in Python | 136,734 | <p>Is it possible to make it appear to a system that a key was pressed, for example I need to make <kbd>A</kbd> key be pressed thousands of times, and it is much to time consuming to do it manually, I would like to write something to do it for me, and the only thing I know well enough is Python.</p>
<p>A better way t... | 13 | 2008-09-25T22:58:01Z | 33,249,229 | <p>You could also use PyAutoGui to send a virtual key presses.</p>
<p>Here's the documentation: <a href="https://pyautogui.readthedocs.org/en/latest/" rel="nofollow">https://pyautogui.readthedocs.org/en/latest/</a></p>
<pre><code>import pyautogui
pyautogui.keypress('Any key combination')
</code></pre>
<p>You can a... | 3 | 2015-10-21T00:57:43Z | [
"python",
"keypress"
] |
Python language API | 136,739 | <p>I'm starting with Python coming from java. </p>
<p>I was wondering if there exists something similar to JavaDoc API where I can find the class, its methods and and example of how to use it.</p>
<p>I've found very helpul to use <em>help( thing )</em> from the Python ( command line ) </p>
<p>I have found this also:... | 6 | 2008-09-25T22:59:10Z | 136,749 | <p><a href="http://docs.python.org/library/pydoc.html" rel="nofollow">pydoc</a>?</p>
<p>I'm not sure if you're looking for something more sophisticated, but it does the trick.</p>
| 5 | 2008-09-25T23:00:48Z | [
"python",
"reference",
"documentation",
"python-2.x"
] |
Python language API | 136,739 | <p>I'm starting with Python coming from java. </p>
<p>I was wondering if there exists something similar to JavaDoc API where I can find the class, its methods and and example of how to use it.</p>
<p>I've found very helpul to use <em>help( thing )</em> from the Python ( command line ) </p>
<p>I have found this also:... | 6 | 2008-09-25T22:59:10Z | 136,758 | <p><a href="https://docs.python.org/py-modindex.html" rel="nofollow">Here</a> is a list of all the modules in Python, not sure if that's what you're really after.</p>
| 1 | 2008-09-25T23:03:33Z | [
"python",
"reference",
"documentation",
"python-2.x"
] |
Python language API | 136,739 | <p>I'm starting with Python coming from java. </p>
<p>I was wondering if there exists something similar to JavaDoc API where I can find the class, its methods and and example of how to use it.</p>
<p>I've found very helpul to use <em>help( thing )</em> from the Python ( command line ) </p>
<p>I have found this also:... | 6 | 2008-09-25T22:59:10Z | 136,760 | <p>If you're working on Windows <a href="http://www.activestate.com/Products/activepython/index.mhtml" rel="nofollow">ActiveState Python</a> comes with the documentation, including the library reference in a searchable help file.</p>
| 0 | 2008-09-25T23:04:21Z | [
"python",
"reference",
"documentation",
"python-2.x"
] |
Python language API | 136,739 | <p>I'm starting with Python coming from java. </p>
<p>I was wondering if there exists something similar to JavaDoc API where I can find the class, its methods and and example of how to use it.</p>
<p>I've found very helpul to use <em>help( thing )</em> from the Python ( command line ) </p>
<p>I have found this also:... | 6 | 2008-09-25T22:59:10Z | 136,783 | <p>The standard python library is fairly well documented. Try jumping into python and importing a module say "os" and running:</p>
<pre><code>import os
help(os)
</code></pre>
<p>This reads the doc strings on each of the items in the module and displays it. This is exactly what pydoc will do too.</p>
<p>EDIT: <a h... | 2 | 2008-09-25T23:11:13Z | [
"python",
"reference",
"documentation",
"python-2.x"
] |
Python language API | 136,739 | <p>I'm starting with Python coming from java. </p>
<p>I was wondering if there exists something similar to JavaDoc API where I can find the class, its methods and and example of how to use it.</p>
<p>I've found very helpul to use <em>help( thing )</em> from the Python ( command line ) </p>
<p>I have found this also:... | 6 | 2008-09-25T22:59:10Z | 136,929 | <p>I've downloaded Python 2.5 from Python.org and It does not contains pydoc.</p>
<pre><code>Directorio de C:\Python25
9/23/2008 10:45 PM <DIR> .
9/23/2008 10:45 PM <DIR> ..
9/23/2008 10:45 PM <DIR> DLLs
9/23/2008 10:45 PM <DIR> Doc
9/23/2008... | 1 | 2008-09-25T23:42:37Z | [
"python",
"reference",
"documentation",
"python-2.x"
] |
Python language API | 136,739 | <p>I'm starting with Python coming from java. </p>
<p>I was wondering if there exists something similar to JavaDoc API where I can find the class, its methods and and example of how to use it.</p>
<p>I've found very helpul to use <em>help( thing )</em> from the Python ( command line ) </p>
<p>I have found this also:... | 6 | 2008-09-25T22:59:10Z | 137,335 | <blockquote>
<p>BTW I know that I would eventually
will read this:</p>
<p><a href="http://docs.python.org/lib/lib.html" rel="nofollow">http://docs.python.org/lib/lib.html</a></p>
<p>But, well, I think it is not today.</p>
</blockquote>
<p>I suggest that you're making a mistake. The lib doc has "the clas... | 1 | 2008-09-26T01:56:12Z | [
"python",
"reference",
"documentation",
"python-2.x"
] |
Python language API | 136,739 | <p>I'm starting with Python coming from java. </p>
<p>I was wondering if there exists something similar to JavaDoc API where I can find the class, its methods and and example of how to use it.</p>
<p>I've found very helpul to use <em>help( thing )</em> from the Python ( command line ) </p>
<p>I have found this also:... | 6 | 2008-09-25T22:59:10Z | 138,121 | <p>It doesn't directly answer your question (so I'll probably be downgraded), but you may be interested in <a href="http://www.jython.org" rel="nofollow">Jython</a>.</p>
<blockquote>
<p>Jython is an implementation of the high-level, dynamic, object-oriented language Python written in 100% Pure Java, and seamlessly i... | 0 | 2008-09-26T07:16:09Z | [
"python",
"reference",
"documentation",
"python-2.x"
] |
Python language API | 136,739 | <p>I'm starting with Python coming from java. </p>
<p>I was wondering if there exists something similar to JavaDoc API where I can find the class, its methods and and example of how to use it.</p>
<p>I've found very helpul to use <em>help( thing )</em> from the Python ( command line ) </p>
<p>I have found this also:... | 6 | 2008-09-25T22:59:10Z | 138,240 | <p>You can set the <em>environment variable</em> <strong>PYTHONDOCS</strong> to point to where the python documentation is installed.</p>
<p>On my system, it's in <em>/usr/share/doc/python2.5</em></p>
<p>So you can define this variable in your <em>shell profile</em> or somewhere else depending on your system:</p>
<b... | 1 | 2008-09-26T08:07:29Z | [
"python",
"reference",
"documentation",
"python-2.x"
] |
Python language API | 136,739 | <p>I'm starting with Python coming from java. </p>
<p>I was wondering if there exists something similar to JavaDoc API where I can find the class, its methods and and example of how to use it.</p>
<p>I've found very helpul to use <em>help( thing )</em> from the Python ( command line ) </p>
<p>I have found this also:... | 6 | 2008-09-25T22:59:10Z | 138,317 | <p>Also try</p>
<pre><code>pydoc -p 11111
</code></pre>
<p>Then type in web browser <a href="http://localhost:11111" rel="nofollow">http://localhost:11111</a></p>
<p>EDIT: of course you can use any other value for port number instead of 11111</p>
| 0 | 2008-09-26T08:34:18Z | [
"python",
"reference",
"documentation",
"python-2.x"
] |
How do you make Python / PostgreSQL faster? | 136,789 | <p>Right now I have a log parser reading through 515mb of plain-text files (a file for each day over the past 4 years). My code currently stands as this: <a href="http://gist.github.com/12978" rel="nofollow">http://gist.github.com/12978</a>. I've used psyco (as seen in the code) and I'm also compiling it and using the ... | 4 | 2008-09-25T23:12:50Z | 136,870 | <p>Use bind variables instead of literal values in the sql statements and create a cursor for
each unique sql statement so that the statement does not need to be reparsed the next time it is used. From the python db api doc:</p>
<blockquote>
<p>Prepare and execute a database
operation (query or command).
Para... | 3 | 2008-09-25T23:29:56Z | [
"python",
"postgresql"
] |
How do you make Python / PostgreSQL faster? | 136,789 | <p>Right now I have a log parser reading through 515mb of plain-text files (a file for each day over the past 4 years). My code currently stands as this: <a href="http://gist.github.com/12978" rel="nofollow">http://gist.github.com/12978</a>. I've used psyco (as seen in the code) and I'm also compiling it and using the ... | 4 | 2008-09-25T23:12:50Z | 137,002 | <p>In the for loop, you're inserting into the 'chats' table repeatedly, so you only need a single sql statement with bind variables, to be executed with different values. So you could put this before the for loop:</p>
<pre><code>insert_statement="""
INSERT INTO chats(person_id, message_type, created_at, channel)
... | 3 | 2008-09-25T23:59:39Z | [
"python",
"postgresql"
] |
How do you make Python / PostgreSQL faster? | 136,789 | <p>Right now I have a log parser reading through 515mb of plain-text files (a file for each day over the past 4 years). My code currently stands as this: <a href="http://gist.github.com/12978" rel="nofollow">http://gist.github.com/12978</a>. I've used psyco (as seen in the code) and I'm also compiling it and using the ... | 4 | 2008-09-25T23:12:50Z | 137,076 | <p>As Mark suggested, use binding variables. The database only has to prepare each statement once, then "fill in the blanks" for each execution. As a nice side effect, it will automatically take care of string-quoting issues (which your program isn't handling).</p>
<p>Turn transactions on (if they aren't already) and ... | 2 | 2008-09-26T00:20:36Z | [
"python",
"postgresql"
] |
How do you make Python / PostgreSQL faster? | 136,789 | <p>Right now I have a log parser reading through 515mb of plain-text files (a file for each day over the past 4 years). My code currently stands as this: <a href="http://gist.github.com/12978" rel="nofollow">http://gist.github.com/12978</a>. I've used psyco (as seen in the code) and I'm also compiling it and using the ... | 4 | 2008-09-25T23:12:50Z | 137,096 | <p>Additionally to the many fine suggestions @Mark Roddy has given, do the following:</p>
<ul>
<li>don't use <code>readlines</code>, you can iterate over file objects</li>
<li>try to use <code>executemany</code> rather than <code>execute</code>: try to do batch inserts rather single inserts, this tends to be faster be... | 1 | 2008-09-26T00:26:21Z | [
"python",
"postgresql"
] |
How do you make Python / PostgreSQL faster? | 136,789 | <p>Right now I have a log parser reading through 515mb of plain-text files (a file for each day over the past 4 years). My code currently stands as this: <a href="http://gist.github.com/12978" rel="nofollow">http://gist.github.com/12978</a>. I've used psyco (as seen in the code) and I'm also compiling it and using the ... | 4 | 2008-09-25T23:12:50Z | 137,320 | <p>Don't waste time profiling. The time is always in the database operations. Do as few as possible. Just the minimum number of inserts.</p>
<p>Three Things.</p>
<p>One. Don't SELECT over and over again to conform the Date, Hostname and Person dimensions. Fetch all the data ONCE into a Python dictionary and use ... | 5 | 2008-09-26T01:50:23Z | [
"python",
"postgresql"
] |
How can I perform a HEAD request with the mechanize library? | 137,580 | <p>I know how to do a HEAD request with httplib, but I have to use mechanize for this site. </p>
<p>Essentially, what I need to do is grab a value from the header (filename) without actually downloading the file.</p>
<p>Any suggestions how I could accomplish this?</p>
| 3 | 2008-09-26T03:20:19Z | 137,624 | <p>Mechanize itself only sends GETs and POSTs, but you can easily extend the Request class to send HEAD. Example:</p>
<pre><code>import mechanize
class HeadRequest(mechanize.Request):
def get_method(self):
return "HEAD"
request = HeadRequest("http://www.example.com/")
response = mechanize.urlopen(request... | 8 | 2008-09-26T03:37:33Z | [
"python",
"http-headers",
"mechanize"
] |
How can I perform a HEAD request with the mechanize library? | 137,580 | <p>I know how to do a HEAD request with httplib, but I have to use mechanize for this site. </p>
<p>Essentially, what I need to do is grab a value from the header (filename) without actually downloading the file.</p>
<p>Any suggestions how I could accomplish this?</p>
| 3 | 2008-09-26T03:20:19Z | 12,680,334 | <p>In mechanize there is no need to do HeadRequest class etc.</p>
<p>Simply</p>
<pre><code>
import mechanize
br = mechanize.Browser()
r = br.open("http://www.example.com/")
print r.info()
</code></pre>
<p>That's all.</p>
| 0 | 2012-10-01T20:11:08Z | [
"python",
"http-headers",
"mechanize"
] |
Get Bound Event Handler in Tkinter | 138,029 | <p>After a bind a method to an event of a Tkinter element is there a way to get the method back?</p>
<pre><code>>>> root = Tkinter.Tk()
>>> frame = Tkinter.Frame(root, width=100, height=100)
>>> frame.bind('<Button-1>', lambda e: pprint('Click')) # function needed
>>> frame.pa... | 1 | 2008-09-26T06:26:17Z | 138,039 | <p>Doesn't appear to be... why not just save it yourself if you're going to need it, or use a non-anonymous function?</p>
<p>Also, your code doesn't work as written: <code>lambda</code> functions can only contain expressions, not statements, so <code>print</code> is a no-go (this will change in Python 3.0 when <code>p... | 0 | 2008-09-26T06:31:03Z | [
"python",
"user-interface",
"events",
"tkinter"
] |
Get Bound Event Handler in Tkinter | 138,029 | <p>After a bind a method to an event of a Tkinter element is there a way to get the method back?</p>
<pre><code>>>> root = Tkinter.Tk()
>>> frame = Tkinter.Frame(root, width=100, height=100)
>>> frame.bind('<Button-1>', lambda e: pprint('Click')) # function needed
>>> frame.pa... | 1 | 2008-09-26T06:26:17Z | 138,258 | <p>The associated call to do that for the tk C API would be <a href="http://linux.about.com/library/cmd/blcmdl3_Tcl_GetCommandInfo.htm" rel="nofollow">Get_GetCommandInfo</a> which</p>
<blockquote>
<p>places information about the command
in the Tcl_CmdInfo structure pointed
to by infoPtr</p>
</blockquote>
<p>How... | 2 | 2008-09-26T08:15:25Z | [
"python",
"user-interface",
"events",
"tkinter"
] |
Get Bound Event Handler in Tkinter | 138,029 | <p>After a bind a method to an event of a Tkinter element is there a way to get the method back?</p>
<pre><code>>>> root = Tkinter.Tk()
>>> frame = Tkinter.Frame(root, width=100, height=100)
>>> frame.bind('<Button-1>', lambda e: pprint('Click')) # function needed
>>> frame.pa... | 1 | 2008-09-26T06:26:17Z | 226,141 | <p>The standard way to do this in Tcl/Tk is trivial: you use the same bind command but without the final argument. </p>
<pre><code>bind .b <Button-1> doSomething
puts "the function is [bind .b <Button-1>]"
=> the function is doSomething
</code></pre>
<p>You can do something similar with Tkinter but the... | 3 | 2008-10-22T15:01:35Z | [
"python",
"user-interface",
"events",
"tkinter"
] |
Is there something like Python's getattr() in C#? | 138,045 | <p>Is there something like <a href="http://effbot.org/zone/python-getattr.htm">Python's getattr()</a> in C#? I would like to create a window by reading a list which contains the names of controls to put on the window.</p>
| 12 | 2008-09-26T06:35:30Z | 138,053 | <p>Use reflection for this.</p>
<p><a href="http://msdn.microsoft.com/en-us/library/system.type.getproperty.aspx" rel="nofollow"><code>Type.GetProperty()</code></a> and <a href="http://msdn.microsoft.com/en-us/library/system.type.getproperty.aspx" rel="nofollow"><code>Type.GetProperties()</code></a> each return <a hre... | 3 | 2008-09-26T06:39:43Z | [
"c#",
"python",
"user-interface"
] |
Is there something like Python's getattr() in C#? | 138,045 | <p>Is there something like <a href="http://effbot.org/zone/python-getattr.htm">Python's getattr()</a> in C#? I would like to create a window by reading a list which contains the names of controls to put on the window.</p>
| 12 | 2008-09-26T06:35:30Z | 138,054 | <p>Yes, you can do this...</p>
<pre><code>typeof(YourObjectType).GetProperty("PropertyName").GetValue(instanceObjectToGetPropFrom, null);
</code></pre>
| 1 | 2008-09-26T06:40:58Z | [
"c#",
"python",
"user-interface"
] |
Is there something like Python's getattr() in C#? | 138,045 | <p>Is there something like <a href="http://effbot.org/zone/python-getattr.htm">Python's getattr()</a> in C#? I would like to create a window by reading a list which contains the names of controls to put on the window.</p>
| 12 | 2008-09-26T06:35:30Z | 138,063 | <p>There's the System.Reflection.PropertyInfo class that can be created using object.GetType().GetProperties(). That can be used to probe an object's properties using strings. (Similar methods exist for object methods, fields, etc.)</p>
<p>I don't think that will help you accomplish your goals though. You should proba... | 0 | 2008-09-26T06:46:51Z | [
"c#",
"python",
"user-interface"
] |
Is there something like Python's getattr() in C#? | 138,045 | <p>Is there something like <a href="http://effbot.org/zone/python-getattr.htm">Python's getattr()</a> in C#? I would like to create a window by reading a list which contains the names of controls to put on the window.</p>
| 12 | 2008-09-26T06:35:30Z | 138,079 | <p>There is also <a href="http://msdn.microsoft.com/en-us/library/66btctbe.aspx">Type.InvokeMember</a>.</p>
<pre><code>public static class ReflectionExt
{
public static object GetAttr(this object obj, string name)
{
Type type = obj.GetType();
BindingFlags flags = BindingFlags.Instance |
... | 9 | 2008-09-26T06:57:23Z | [
"c#",
"python",
"user-interface"
] |
How can I read the RGB value of a given pixel in Python? | 138,250 | <p>If I open an image with <code>open("image.jpg")</code>, how can I get the RGB values of a pixel, if I have the coordinates of the pixel?</p>
<p>Then how can I do the reverse of this? Starting with a blank graphic, 'write' a pixel with a certain RGB value?</p>
<p>It would be so much better if I didn't have to downl... | 63 | 2008-09-26T08:10:50Z | 138,254 | <p>Image manipulation is a complex topic, and it's best if you <em>do</em> use a library. I can recommend <a href="http://newcenturycomputers.net/projects/gdmodule.html" rel="nofollow">gdmodule</a> which provides easy access to many different image formats from within Python.</p>
| 1 | 2008-09-26T08:14:23Z | [
"python",
"graphics",
"rgb"
] |
How can I read the RGB value of a given pixel in Python? | 138,250 | <p>If I open an image with <code>open("image.jpg")</code>, how can I get the RGB values of a pixel, if I have the coordinates of the pixel?</p>
<p>Then how can I do the reverse of this? Starting with a blank graphic, 'write' a pixel with a certain RGB value?</p>
<p>It would be so much better if I didn't have to downl... | 63 | 2008-09-26T08:10:50Z | 138,260 | <p>It's probably best to use the <a href="http://www.pythonware.com/products/pil/">Python Image Library</a> to do this which I'm afraid is a separate download.</p>
<p>The easiest way to do what you want is via the <a href="http://effbot.org/imagingbook/image.htm">load() method on the Image object</a> which returns a p... | 108 | 2008-09-26T08:15:56Z | [
"python",
"graphics",
"rgb"
] |
How can I read the RGB value of a given pixel in Python? | 138,250 | <p>If I open an image with <code>open("image.jpg")</code>, how can I get the RGB values of a pixel, if I have the coordinates of the pixel?</p>
<p>Then how can I do the reverse of this? Starting with a blank graphic, 'write' a pixel with a certain RGB value?</p>
<p>It would be so much better if I didn't have to downl... | 63 | 2008-09-26T08:10:50Z | 138,300 | <p>There's a really good article on wiki.wxpython.org entitled <a href="http://wiki.wxpython.org/index.cgi/WorkingWithImages" rel="nofollow">Working With Images</a>. The article mentions the possiblity of using wxWidgets (wxImage), PIL or PythonMagick. Personally, I've used PIL and wxWidgets and both make image manipul... | 3 | 2008-09-26T08:28:57Z | [
"python",
"graphics",
"rgb"
] |
How can I read the RGB value of a given pixel in Python? | 138,250 | <p>If I open an image with <code>open("image.jpg")</code>, how can I get the RGB values of a pixel, if I have the coordinates of the pixel?</p>
<p>Then how can I do the reverse of this? Starting with a blank graphic, 'write' a pixel with a certain RGB value?</p>
<p>It would be so much better if I didn't have to downl... | 63 | 2008-09-26T08:10:50Z | 139,070 | <p><strong>PyPNG - lightweight PNG decoder/encoder</strong></p>
<p>Although the question hints at JPG, I hope my answer will be useful to some people.</p>
<p>Here's how to read and write PNG pixels using <a href="https://pypi.python.org/pypi/pypng/0.0.18" rel="nofollow">PyPNG module</a>:</p>
<pre><code>import png, a... | 20 | 2008-09-26T12:20:38Z | [
"python",
"graphics",
"rgb"
] |
How can I read the RGB value of a given pixel in Python? | 138,250 | <p>If I open an image with <code>open("image.jpg")</code>, how can I get the RGB values of a pixel, if I have the coordinates of the pixel?</p>
<p>Then how can I do the reverse of this? Starting with a blank graphic, 'write' a pixel with a certain RGB value?</p>
<p>It would be so much better if I didn't have to downl... | 63 | 2008-09-26T08:10:50Z | 663,861 | <p>You can use <a href="http://www.pygame.org" rel="nofollow">pygame</a>'s surfarray module. This module has a 3d pixel array returning method called pixels3d(surface). I've shown usage below:</p>
<pre><code>from pygame import surfarray, image, display
import pygame
import numpy #important to import
pygame.init()
ima... | 3 | 2009-03-19T20:14:21Z | [
"python",
"graphics",
"rgb"
] |
How can I read the RGB value of a given pixel in Python? | 138,250 | <p>If I open an image with <code>open("image.jpg")</code>, how can I get the RGB values of a pixel, if I have the coordinates of the pixel?</p>
<p>Then how can I do the reverse of this? Starting with a blank graphic, 'write' a pixel with a certain RGB value?</p>
<p>It would be so much better if I didn't have to downl... | 63 | 2008-09-26T08:10:50Z | 5,365,853 | <p>As Dave Webb said.</p>
<p>Here is my working code snippet printing the pixel colours from an image:</p>
<pre><code>import os, sys
import Image
im = Image.open("image.jpg")
x = 3
y = 4
pix = im.load()
print pix[x,y]
</code></pre>
| 8 | 2011-03-20T00:10:43Z | [
"python",
"graphics",
"rgb"
] |
How can I read the RGB value of a given pixel in Python? | 138,250 | <p>If I open an image with <code>open("image.jpg")</code>, how can I get the RGB values of a pixel, if I have the coordinates of the pixel?</p>
<p>Then how can I do the reverse of this? Starting with a blank graphic, 'write' a pixel with a certain RGB value?</p>
<p>It would be so much better if I didn't have to downl... | 63 | 2008-09-26T08:10:50Z | 22,877,878 | <p>install PIL using the command "sudo apt-get install python-imaging" and run the following program. It will print RGB values of the image. If the image is large redirect the output to a file using '>' later open the file to see RGB values</p>
<pre><code>import PIL
import Image
FILENAME='fn.gif' #image can be in gif ... | 2 | 2014-04-05T07:23:04Z | [
"python",
"graphics",
"rgb"
] |
How can I read the RGB value of a given pixel in Python? | 138,250 | <p>If I open an image with <code>open("image.jpg")</code>, how can I get the RGB values of a pixel, if I have the coordinates of the pixel?</p>
<p>Then how can I do the reverse of this? Starting with a blank graphic, 'write' a pixel with a certain RGB value?</p>
<p>It would be so much better if I didn't have to downl... | 63 | 2008-09-26T08:10:50Z | 27,370,477 | <p>You could use Tkinter module, which is already installed with Python.(I use Python 2.7 and OS X)</p>
<p>Here is the code from <a href="http://tkinter.unpythonic.net/wiki/PhotoImage" rel="nofollow">http://tkinter.unpythonic.net/wiki/PhotoImage</a>.</p>
<p>Set RGB values.</p>
<pre><code>from Tkinter import *
root ... | 1 | 2014-12-09T02:22:25Z | [
"python",
"graphics",
"rgb"
] |
How can I read the RGB value of a given pixel in Python? | 138,250 | <p>If I open an image with <code>open("image.jpg")</code>, how can I get the RGB values of a pixel, if I have the coordinates of the pixel?</p>
<p>Then how can I do the reverse of this? Starting with a blank graphic, 'write' a pixel with a certain RGB value?</p>
<p>It would be so much better if I didn't have to downl... | 63 | 2008-09-26T08:10:50Z | 27,960,627 | <p>Using <a href="http://python-pillow.github.io/" rel="nofollow">Pillow</a> (which works with Python 3.X as well as Python 2.7+), you can do the following:</p>
<pre><code>from PIL import Image
im = Image.open('image.jpg', 'r')
width, height = im.size
pixel_values = list(im.getdata())
</code></pre>
<p>Now you have al... | 4 | 2015-01-15T09:46:10Z | [
"python",
"graphics",
"rgb"
] |
How can I read the RGB value of a given pixel in Python? | 138,250 | <p>If I open an image with <code>open("image.jpg")</code>, how can I get the RGB values of a pixel, if I have the coordinates of the pixel?</p>
<p>Then how can I do the reverse of this? Starting with a blank graphic, 'write' a pixel with a certain RGB value?</p>
<p>It would be so much better if I didn't have to downl... | 63 | 2008-09-26T08:10:50Z | 33,630,650 | <pre><code>photo = Image.open('IN.jpg') #your image
photo = photo.convert('RGB')
width = photo.size[0] #define W and H
height = photo.size[1]
for y in range(0, height): #each pixel has coordinates
row = ""
for x in range(0, width):
RGB = photo.getpixel((x,y))
R,G,B = RGB #now you can use the... | 2 | 2015-11-10T13:02:32Z | [
"python",
"graphics",
"rgb"
] |
Dynamic radio button creation | 138,353 | <p>In wxPython, if I create a list of radio buttons and place the list initially, is it possible to change the contents in that list later?</p>
<p>For example, I have a panel that uses a boxSizer to place the widgets initially. One of those widgets is a list of radio buttons (I have also tried a normal radiobox). I wo... | 1 | 2008-09-26T08:54:37Z | 138,479 | <p>Two possible solutions</p>
<ol>
<li>Rebuild the sizer with the radio widgets each time you have to make a change</li>
<li>Hold the radio button widgets in a list, and call SetLabel each time you have to change their labels.</li>
</ol>
| 0 | 2008-09-26T09:34:03Z | [
"python",
"user-interface",
"layout",
"wxpython"
] |
Dynamic radio button creation | 138,353 | <p>In wxPython, if I create a list of radio buttons and place the list initially, is it possible to change the contents in that list later?</p>
<p>For example, I have a panel that uses a boxSizer to place the widgets initially. One of those widgets is a list of radio buttons (I have also tried a normal radiobox). I wo... | 1 | 2008-09-26T08:54:37Z | 139,009 | <p>To make new list elements appear in correct places, you have to re-layout the grid after adding new elements to it. For example, to add a few new items, you could call:</p>
<pre><code>def addNewSkills(self, newSkillList):
'''newSkillList is a list of skill names you want to add'''
for skillName in newSkillL... | 1 | 2008-09-26T12:06:40Z | [
"python",
"user-interface",
"layout",
"wxpython"
] |
Dynamic radio button creation | 138,353 | <p>In wxPython, if I create a list of radio buttons and place the list initially, is it possible to change the contents in that list later?</p>
<p>For example, I have a panel that uses a boxSizer to place the widgets initially. One of those widgets is a list of radio buttons (I have also tried a normal radiobox). I wo... | 1 | 2008-09-26T08:54:37Z | 145,580 | <p>I was able to fix it by using the info DzinX provided, with some modification.</p>
<p>It appears that posting the radio buttons box first "locked in" the box to the sizer. If I tried to add a new box, I would get an error message stating that I was trying to add the widget to the same sizer twice.</p>
<p>By simply... | 0 | 2008-09-28T09:47:15Z | [
"python",
"user-interface",
"layout",
"wxpython"
] |
Pure Python XSLT library | 138,502 | <p>Is there an XSLT library that is pure Python?</p>
<p>Installing libxml2+libxslt or any similar C libraries is a problem on some of the platforms I need to support.</p>
<p>I really only need basic XSLT support, and speed is not a major issue.</p>
| 19 | 2008-09-26T09:43:43Z | 138,545 | <p>Have you looked at <a href="http://4suite.org/index.xhtml" rel="nofollow">4suite</a>?</p>
| 1 | 2008-09-26T09:58:28Z | [
"python",
"xml",
"xslt"
] |
Pure Python XSLT library | 138,502 | <p>Is there an XSLT library that is pure Python?</p>
<p>Installing libxml2+libxslt or any similar C libraries is a problem on some of the platforms I need to support.</p>
<p>I really only need basic XSLT support, and speed is not a major issue.</p>
| 19 | 2008-09-26T09:43:43Z | 141,084 | <p>If you only need <em>basic</em> support, and your XML isn't too crazy, consider removing the XSLT element from the equation and just using a DOM/SAX parser.</p>
<p>Here's some info from the <a href="http://wiki.python.org/" rel="nofollow">PythonInfo Wiki</a>:</p>
<blockquote>
<p>[DOM] sucks up an entire XML file... | 1 | 2008-09-26T18:18:34Z | [
"python",
"xml",
"xslt"
] |
Pure Python XSLT library | 138,502 | <p>Is there an XSLT library that is pure Python?</p>
<p>Installing libxml2+libxslt or any similar C libraries is a problem on some of the platforms I need to support.</p>
<p>I really only need basic XSLT support, and speed is not a major issue.</p>
| 19 | 2008-09-26T09:43:43Z | 592,466 | <p>Unfortunately there are no pure-python XSLT processors at the moment. If you need something that is more platform independent, you may want to use a Java-based XSLT processor like <a href="http://saxon.sourceforge.net/">Saxon</a>. 4Suite is working on a pure-python XPath parser, but it doesn't look like a pure XSLT ... | 9 | 2009-02-26T21:13:59Z | [
"python",
"xml",
"xslt"
] |
Pure Python XSLT library | 138,502 | <p>Is there an XSLT library that is pure Python?</p>
<p>Installing libxml2+libxslt or any similar C libraries is a problem on some of the platforms I need to support.</p>
<p>I really only need basic XSLT support, and speed is not a major issue.</p>
| 19 | 2008-09-26T09:43:43Z | 1,832,692 | <p>I don't think you can do it in cpython: there are no pure python XSLT implementations.</p>
<p>But you can trivially do it in jython, using the inbuilt XSLT APIs of the JVM. I wrote a blog post for the specific case of doing it on Google AppEngine, but the code given should work under jython in anyn circumstances.</... | 6 | 2009-12-02T12:47:18Z | [
"python",
"xml",
"xslt"
] |
Pure Python XSLT library | 138,502 | <p>Is there an XSLT library that is pure Python?</p>
<p>Installing libxml2+libxslt or any similar C libraries is a problem on some of the platforms I need to support.</p>
<p>I really only need basic XSLT support, and speed is not a major issue.</p>
| 19 | 2008-09-26T09:43:43Z | 14,650,028 | <p>There's also <a href="http://lxml.de/" rel="nofollow">http://lxml.de/</a> </p>
<blockquote>
<p>"lxml is the most feature-rich and easy-to-use library for processing XML and HTML in the Python language."</p>
</blockquote>
| 1 | 2013-02-01T15:51:58Z | [
"python",
"xml",
"xslt"
] |
Is it feasible to compile Python to machine code? | 138,521 | <p>How feasible would it be to compile Python (possibly via an intermediate C representation) into machine code?</p>
<p>Presumably it would need to link to a Python runtime library, and any parts of the Python standard library which were Python themselves would need to be compiled (and linked in) too.</p>
<p>Also, yo... | 93 | 2008-09-26T09:51:51Z | 138,539 | <p>This might seem reasonable at first glance, however there are a lot of ordinary things in Python that aren't directly mappable to to a C representation without carrying over a lot of the Python runtime support. For example, duck typing comes to mind. Many functions in Python that read input can take a file <em>or fi... | 6 | 2008-09-26T09:56:08Z | [
"python",
"c",
"linker",
"compilation"
] |
Is it feasible to compile Python to machine code? | 138,521 | <p>How feasible would it be to compile Python (possibly via an intermediate C representation) into machine code?</p>
<p>Presumably it would need to link to a Python runtime library, and any parts of the Python standard library which were Python themselves would need to be compiled (and linked in) too.</p>
<p>Also, yo... | 93 | 2008-09-26T09:51:51Z | 138,548 | <p><a href="http://psyco.sourceforge.net/" rel="nofollow">Psyco</a> is a kind of just-in-time (JIT) compiler: dynamic compiler for Python, runs code 2-100 times faster, but it needs much memory.</p>
<p>In short: it run your existing Python software much faster, with no change in your source but it doesn't compile to o... | 2 | 2008-09-26T09:59:12Z | [
"python",
"c",
"linker",
"compilation"
] |
Is it feasible to compile Python to machine code? | 138,521 | <p>How feasible would it be to compile Python (possibly via an intermediate C representation) into machine code?</p>
<p>Presumably it would need to link to a Python runtime library, and any parts of the Python standard library which were Python themselves would need to be compiled (and linked in) too.</p>
<p>Also, yo... | 93 | 2008-09-26T09:51:51Z | 138,553 | <p>Try <a href="http://shed-skin.blogspot.com/">ShedSkin</a> Python-to-C++ compiler, but it is far from perfect. Also there is Psyco - Python JIT if only speedup is needed. But IMHO this is not worth the effort. For speed-critical parts of code best solution would be to write them as C/C++ extensions. </p>
| 15 | 2008-09-26T10:00:15Z | [
"python",
"c",
"linker",
"compilation"
] |
Is it feasible to compile Python to machine code? | 138,521 | <p>How feasible would it be to compile Python (possibly via an intermediate C representation) into machine code?</p>
<p>Presumably it would need to link to a Python runtime library, and any parts of the Python standard library which were Python themselves would need to be compiled (and linked in) too.</p>
<p>Also, yo... | 93 | 2008-09-26T09:51:51Z | 138,554 | <p>Jython has a compiler targeting JVM bytecode. The bytecode is fully dynamic, just like the Python language itself! Very cool. (Yes, as Greg Hewgill's answer alludes, the bytecode does use the Jython runtime, and so the Jython jar file must be distributed with your app.)</p>
| 2 | 2008-09-26T10:00:16Z | [
"python",
"c",
"linker",
"compilation"
] |
Is it feasible to compile Python to machine code? | 138,521 | <p>How feasible would it be to compile Python (possibly via an intermediate C representation) into machine code?</p>
<p>Presumably it would need to link to a Python runtime library, and any parts of the Python standard library which were Python themselves would need to be compiled (and linked in) too.</p>
<p>Also, yo... | 93 | 2008-09-26T09:51:51Z | 138,582 | <p><a href="http://codespeak.net/pypy/dist/pypy/doc/home.html">PyPy</a> is a project to reimplement Python in Python, using compilation to native code as one of the implementation strategies (others being a VM with JIT, using JVM, etc.). Their compiled C versions run slower than CPython on average but much faster for s... | 11 | 2008-09-26T10:06:06Z | [
"python",
"c",
"linker",
"compilation"
] |
Is it feasible to compile Python to machine code? | 138,521 | <p>How feasible would it be to compile Python (possibly via an intermediate C representation) into machine code?</p>
<p>Presumably it would need to link to a Python runtime library, and any parts of the Python standard library which were Python themselves would need to be compiled (and linked in) too.</p>
<p>Also, yo... | 93 | 2008-09-26T09:51:51Z | 138,585 | <p>As @Greg Hewgill says it, there are good reasons why this is not always possible. However, certain kinds of code (like very algorithmic code) can be turned into "real" machine code. </p>
<p>There are several options:</p>
<ul>
<li>Use <a href="http://psyco.sourceforge.net/">Psyco</a>, which emits machine code dynam... | 41 | 2008-09-26T10:06:43Z | [
"python",
"c",
"linker",
"compilation"
] |
Is it feasible to compile Python to machine code? | 138,521 | <p>How feasible would it be to compile Python (possibly via an intermediate C representation) into machine code?</p>
<p>Presumably it would need to link to a Python runtime library, and any parts of the Python standard library which were Python themselves would need to be compiled (and linked in) too.</p>
<p>Also, yo... | 93 | 2008-09-26T09:51:51Z | 138,586 | <p><a href="http://www.cosc.canterbury.ac.nz/greg.ewing/python/Pyrex/" rel="nofollow">Pyrex</a> is a subset of the Python language that compiles to C, done by the guy that first built <a href="http://www.secnetix.de/olli/Python/list_comprehensions.hawk" rel="nofollow">list comprehensions</a> for Python. It was mainly ... | 8 | 2008-09-26T10:06:46Z | [
"python",
"c",
"linker",
"compilation"
] |
Is it feasible to compile Python to machine code? | 138,521 | <p>How feasible would it be to compile Python (possibly via an intermediate C representation) into machine code?</p>
<p>Presumably it would need to link to a Python runtime library, and any parts of the Python standard library which were Python themselves would need to be compiled (and linked in) too.</p>
<p>Also, yo... | 93 | 2008-09-26T09:51:51Z | 138,605 | <p>The answer is "Yes, it is possible". You could take Python code and attempt to compile it into the equivalent C code using the CPython API. In fact, there used to be a Python2C project that did just that, but I haven't heard about it in many years (back in the Python 1.5 days is when I last saw it.)</p>
<p>You coul... | 2 | 2008-09-26T10:14:09Z | [
"python",
"c",
"linker",
"compilation"
] |
Is it feasible to compile Python to machine code? | 138,521 | <p>How feasible would it be to compile Python (possibly via an intermediate C representation) into machine code?</p>
<p>Presumably it would need to link to a Python runtime library, and any parts of the Python standard library which were Python themselves would need to be compiled (and linked in) too.</p>
<p>Also, yo... | 93 | 2008-09-26T09:51:51Z | 11,415,005 | <p>py2c ( <a href="http://code.google.com/p/py2c">http://code.google.com/p/py2c</a>) can convert python code to c/c++
I am the solo developer of py2c.</p>
| 14 | 2012-07-10T14:00:44Z | [
"python",
"c",
"linker",
"compilation"
] |
Is it feasible to compile Python to machine code? | 138,521 | <p>How feasible would it be to compile Python (possibly via an intermediate C representation) into machine code?</p>
<p>Presumably it would need to link to a Python runtime library, and any parts of the Python standard library which were Python themselves would need to be compiled (and linked in) too.</p>
<p>Also, yo... | 93 | 2008-09-26T09:51:51Z | 22,952,452 | <p><a href="http://www.nuitka.net/">Nuitka</a> is a Python to C++ compiler that links against libpython. It appears to be a relatively new project. The author claims a <a href="http://www.nuitka.net/pages/overview.html">speed improvement</a> over CPython on the pystone benchmark. </p>
| 6 | 2014-04-09T03:52:37Z | [
"python",
"c",
"linker",
"compilation"
] |
Is it feasible to compile Python to machine code? | 138,521 | <p>How feasible would it be to compile Python (possibly via an intermediate C representation) into machine code?</p>
<p>Presumably it would need to link to a Python runtime library, and any parts of the Python standard library which were Python themselves would need to be compiled (and linked in) too.</p>
<p>Also, yo... | 93 | 2008-09-26T09:51:51Z | 23,596,973 | <p>This doesn't compile Python to machine code. But allows to create a shared library to call Python code.</p>
<p>If what you are looking for is an easy way to run Python code from C without relying on execp stuff. You could generate a shared library from python code wrapped with a few calls to <a href="https://docs.p... | 2 | 2014-05-11T19:29:38Z | [
"python",
"c",
"linker",
"compilation"
] |
Is it feasible to compile Python to machine code? | 138,521 | <p>How feasible would it be to compile Python (possibly via an intermediate C representation) into machine code?</p>
<p>Presumably it would need to link to a Python runtime library, and any parts of the Python standard library which were Python themselves would need to be compiled (and linked in) too.</p>
<p>Also, yo... | 93 | 2008-09-26T09:51:51Z | 32,293,870 | <p>Some extra references:</p>
<ul>
<li><p><a href="https://github.com/dropbox/pyston" rel="nofollow">https://github.com/dropbox/pyston</a> is a JIT compiler for Python developped by Dropbox</p></li>
<li><p><a href="http://pythonhosted.org/pythran" rel="nofollow">http://pythonhosted.org/pythran</a> is a compile-time py... | 3 | 2015-08-30T06:27:35Z | [
"python",
"c",
"linker",
"compilation"
] |
Can Regex be used for this particular string manipulation? | 138,552 | <p>I need to replace character (say) <strong>x</strong> with character (say) <strong>P</strong> in a string, but only if it is contained in a quoted substring.
An example makes it clearer:</p>
<pre><code>axbx'cxdxe'fxgh'ixj'k -> axbx'cPdPe'fxgh'iPj'k
</code></pre>
<p>Let's assume, for the sake of simplicity, that... | 7 | 2008-09-26T10:00:10Z | 138,594 | <p>Not with plain regexp. Regular expressions have no "memory" so they cannot distinguish between being "inside" or "outside" quotes. </p>
<p>You need something more powerful, for example using <a href="http://gema.sourceforge.net" rel="nofollow">gema</a> it would be straighforward:</p>
<pre><code>'<repl>'=$0
r... | 1 | 2008-09-26T10:08:42Z | [
"c#",
"python",
"regex",
"language-agnostic"
] |
Can Regex be used for this particular string manipulation? | 138,552 | <p>I need to replace character (say) <strong>x</strong> with character (say) <strong>P</strong> in a string, but only if it is contained in a quoted substring.
An example makes it clearer:</p>
<pre><code>axbx'cxdxe'fxgh'ixj'k -> axbx'cPdPe'fxgh'iPj'k
</code></pre>
<p>Let's assume, for the sake of simplicity, that... | 7 | 2008-09-26T10:00:10Z | 138,598 | <p>Sorry to break your hopes, but you need a push-down automata to do that. There is more info here:
<a href="http://en.wikipedia.org/wiki/Pushdown_automaton" rel="nofollow">Pushdown Automaton</a></p>
<p>In short, Regular expressions, which are finite state machines can only read and has no memory while pushdown autom... | 0 | 2008-09-26T10:10:00Z | [
"c#",
"python",
"regex",
"language-agnostic"
] |
Can Regex be used for this particular string manipulation? | 138,552 | <p>I need to replace character (say) <strong>x</strong> with character (say) <strong>P</strong> in a string, but only if it is contained in a quoted substring.
An example makes it clearer:</p>
<pre><code>axbx'cxdxe'fxgh'ixj'k -> axbx'cPdPe'fxgh'iPj'k
</code></pre>
<p>Let's assume, for the sake of simplicity, that... | 7 | 2008-09-26T10:00:10Z | 138,615 | <p>I was able to do this with Python:</p>
<pre><code>>>> import re
>>> re.sub(r"x(?=[^']*'([^']|'[^']*')*$)", "P", "axbx'cxdxe'fxgh'ixj'k")
"axbx'cPdPe'fxgh'iPj'k"
</code></pre>
<p>What this does is use the non-capturing match (?=...) to check that the character x is within a quoted string. It looks... | 8 | 2008-09-26T10:18:50Z | [
"c#",
"python",
"regex",
"language-agnostic"
] |
Can Regex be used for this particular string manipulation? | 138,552 | <p>I need to replace character (say) <strong>x</strong> with character (say) <strong>P</strong> in a string, but only if it is contained in a quoted substring.
An example makes it clearer:</p>
<pre><code>axbx'cxdxe'fxgh'ixj'k -> axbx'cPdPe'fxgh'iPj'k
</code></pre>
<p>Let's assume, for the sake of simplicity, that... | 7 | 2008-09-26T10:00:10Z | 138,620 | <p>Similar discussion about balanced text replaces: <a href="http://stackoverflow.com/questions/133601/can-regular-expressions-be-used-to-match-nested-patterns#133771">http://stackoverflow.com/questions/133601/can-regular-expressions-be-used-to-match-nested-patterns#133771</a></p>
<p>Although you can try this in Vim, ... | 1 | 2008-09-26T10:19:31Z | [
"c#",
"python",
"regex",
"language-agnostic"
] |
Can Regex be used for this particular string manipulation? | 138,552 | <p>I need to replace character (say) <strong>x</strong> with character (say) <strong>P</strong> in a string, but only if it is contained in a quoted substring.
An example makes it clearer:</p>
<pre><code>axbx'cxdxe'fxgh'ixj'k -> axbx'cPdPe'fxgh'iPj'k
</code></pre>
<p>Let's assume, for the sake of simplicity, that... | 7 | 2008-09-26T10:00:10Z | 138,755 | <p>I converted Greg Hewgill's python code to C# and it worked!</p>
<pre><code>[Test]
public void ReplaceTextInQuotes()
{
Assert.AreEqual("axbx'cPdPe'fxgh'iPj'k",
Regex.Replace("axbx'cxdxe'fxgh'ixj'k",
@"x(?=[^']*'([^']|'[^']*')*$)", "P"));
}
</code></pre>
<p>That test passed.</p>
| 9 | 2008-09-26T11:04:02Z | [
"c#",
"python",
"regex",
"language-agnostic"
] |
Can Regex be used for this particular string manipulation? | 138,552 | <p>I need to replace character (say) <strong>x</strong> with character (say) <strong>P</strong> in a string, but only if it is contained in a quoted substring.
An example makes it clearer:</p>
<pre><code>axbx'cxdxe'fxgh'ixj'k -> axbx'cPdPe'fxgh'iPj'k
</code></pre>
<p>Let's assume, for the sake of simplicity, that... | 7 | 2008-09-26T10:00:10Z | 139,467 | <pre><code>Pattern: (?s)\G((?:^[^']*'|(?<=.))(?:'[^']*'|[^'x]+)*+)x
Replacement: \1P
</code></pre>
<ol>
<li><code>\G</code> — Anchor each match at the end of the previous one, or the start of the string.</li>
<li><code>(?:^[^']*'|(?<=.))</code> — If it is at the beginning of the string, match up ... | 1 | 2008-09-26T13:22:18Z | [
"c#",
"python",
"regex",
"language-agnostic"
] |
Can Regex be used for this particular string manipulation? | 138,552 | <p>I need to replace character (say) <strong>x</strong> with character (say) <strong>P</strong> in a string, but only if it is contained in a quoted substring.
An example makes it clearer:</p>
<pre><code>axbx'cxdxe'fxgh'ixj'k -> axbx'cPdPe'fxgh'iPj'k
</code></pre>
<p>Let's assume, for the sake of simplicity, that... | 7 | 2008-09-26T10:00:10Z | 139,802 | <p>The trick is to use non-capturing group to match the part of the string <em>following</em> the match (character <strong>x</strong>) we are searching for.
Trying to match the string up to <strong>x</strong> will only find either the first or the last occurence, depending whether non-greedy quantifiers are used.
Here'... | 2 | 2008-09-26T14:17:33Z | [
"c#",
"python",
"regex",
"language-agnostic"
] |
Can Regex be used for this particular string manipulation? | 138,552 | <p>I need to replace character (say) <strong>x</strong> with character (say) <strong>P</strong> in a string, but only if it is contained in a quoted substring.
An example makes it clearer:</p>
<pre><code>axbx'cxdxe'fxgh'ixj'k -> axbx'cPdPe'fxgh'iPj'k
</code></pre>
<p>Let's assume, for the sake of simplicity, that... | 7 | 2008-09-26T10:00:10Z | 140,977 | <pre><code>#!/usr/bin/perl -w
use strict;
# Break up the string.
# The spliting uses quotes
# as the delimiter.
# Put every broken substring
# into the @fields array.
my @fields;
while (<>) {
@fields = split /'/, $_;
}
# For every substring indexed with an odd
# number, search for x and replace it
# with ... | 2 | 2008-09-26T17:56:13Z | [
"c#",
"python",
"regex",
"language-agnostic"
] |
Can Regex be used for this particular string manipulation? | 138,552 | <p>I need to replace character (say) <strong>x</strong> with character (say) <strong>P</strong> in a string, but only if it is contained in a quoted substring.
An example makes it clearer:</p>
<pre><code>axbx'cxdxe'fxgh'ixj'k -> axbx'cPdPe'fxgh'iPj'k
</code></pre>
<p>Let's assume, for the sake of simplicity, that... | 7 | 2008-09-26T10:00:10Z | 150,711 | <p>A more general (and simpler) solution which allows non-paired quotes.</p>
<ol>
<li>Find quoted string</li>
<li><p>Replace 'x' by 'P' in the string</p>
<pre><code>#!/usr/bin/env python
import re
text = "axbx'cxdxe'fxgh'ixj'k"
s = re.sub("'.*?'", lambda m: re.sub("x", "P", m.group(0)), text)
print s == "axbx'c... | 2 | 2008-09-29T21:16:12Z | [
"c#",
"python",
"regex",
"language-agnostic"
] |
Vim extension (via Python)? | 138,680 | <p>is it possible to extend vim functionality via custom extension (preferably, written in Python)?</p>
<p>What I need ideally is custom command when in command mode. E.g.</p>
<p>ESC</p>
<p>:do_this</p>
<p>:do_that</p>
| 10 | 2008-09-26T10:45:57Z | 138,709 | <p>vim supports scripting in python (and in perl as well, I think).</p>
<p>You just have to make sure that the vim distribution you are using has been compiled with python support.</p>
<p>If you are using a Linux system, you can download the source and then compile it with</p>
<pre><code>./configure --enable-pythoni... | 19 | 2008-09-26T10:55:13Z | [
"python",
"vim"
] |
Vim extension (via Python)? | 138,680 | <p>is it possible to extend vim functionality via custom extension (preferably, written in Python)?</p>
<p>What I need ideally is custom command when in command mode. E.g.</p>
<p>ESC</p>
<p>:do_this</p>
<p>:do_that</p>
| 10 | 2008-09-26T10:45:57Z | 138,720 | <p>Yes it is. There are several extensions on <a href="http://www.vim.org/scripts/index.php" rel="nofollow">http://www.vim.org/scripts/index.php</a> </p>
<p>It can be done with python as well if the support for python is compiled in. </p>
<p>Article about it: <a href="http://www.techrepublic.com/article/extending-vim... | 5 | 2008-09-26T10:57:54Z | [
"python",
"vim"
] |
Vim extension (via Python)? | 138,680 | <p>is it possible to extend vim functionality via custom extension (preferably, written in Python)?</p>
<p>What I need ideally is custom command when in command mode. E.g.</p>
<p>ESC</p>
<p>:do_this</p>
<p>:do_that</p>
| 10 | 2008-09-26T10:45:57Z | 5,293,536 | <p>Had a problems to compile Vim with Python. </p>
<p>"...checking if compile and link flags for Python are sane... no: PYTHON DISABLED" in the ./configure output.</p>
<p>On Ubuntu 10.04 you have to install '<strong>python2.6-dev</strong>'. The flags for ./configure are:</p>
<p>--enable-pythoninterp</p>
<p>--with-p... | 3 | 2011-03-14T00:29:53Z | [
"python",
"vim"
] |
How do I test a django database schema? | 138,851 | <p>I want to write tests that can show whether or not the database is in sync with my models.py file. Actually I have already written them, only to find out that django creates a new database each time the tests are run based on the models.py file.
Is there any way I can make the <strong>models.py test</strong> use th... | 6 | 2008-09-26T11:23:51Z | 139,137 | <p>What we did was override the default test_runner so that it wouldn't create a new database to test against. This way, it runs the test against whatever our current local database looks like. But be very careful if you use this method because any changes to data you make in your tests will be permanent. I made sur... | 8 | 2008-09-26T12:32:46Z | [
"python",
"django",
"unit-testing",
"model"
] |
PyQt - QScrollBar | 139,005 | <p>Dear Stacktoverflow, can you show me an example of how to use a QScrollBar? Thanks.</p>
| 0 | 2008-09-26T12:05:29Z | 139,056 | <p>It will come down to you using the QScrollArea, it is a widget that implements showing something that is larger than the available space. You will not need to use QScrollBar directly. I don't have a PyQt example but there is a C++ example in the QT distribution it is called the "Image Viewer". The object hierarchy w... | 1 | 2008-09-26T12:18:12Z | [
"python",
"pyqt"
] |
PyQt - QScrollBar | 139,005 | <p>Dear Stacktoverflow, can you show me an example of how to use a QScrollBar? Thanks.</p>
| 0 | 2008-09-26T12:05:29Z | 139,082 | <p>In the PyQT source code distribution, look at the file:</p>
<blockquote>
<p>examples/widgets/sliders.pyw</p>
</blockquote>
<p>Or there is a minimal example <a href="http://www.zetcode.com/tutorials/pyqt4/widgets/" rel="nofollow">here</a> (I guess I shouldn't copy paste because of potential copyright issues)</p>
| 0 | 2008-09-26T12:23:54Z | [
"python",
"pyqt"
] |
PyQt - QScrollBar | 139,005 | <p>Dear Stacktoverflow, can you show me an example of how to use a QScrollBar? Thanks.</p>
| 0 | 2008-09-26T12:05:29Z | 139,107 | <pre><code>>>> import sys
>>> from PyQt4 import QtCore, QtGui
>>> app = QtGui.QApplication(sys.argv)
>>> sb = QtGui.QScrollBar()
>>> sb.setMinimum(0)
>>> sb.setMaximum(100)
>>> def on_slider_moved(value): print "new slider position: %i" % (value, )
>>... | 2 | 2008-09-26T12:28:38Z | [
"python",
"pyqt"
] |
listing all functions in a python module | 139,180 | <p>I have a python module installed on my system and I'd like to be able to see what functions/classes/methods are available in it. </p>
<p>I want to call the doc function on each one. In ruby I can do something like ClassName.methods to get a list of all the methods available on that class. Is there something simil... | 164 | 2008-09-26T12:38:52Z | 139,193 | <p>You can use <code>dir(module)</code> to see all available methods/attributes. Also check out PyDocs.</p>
| 238 | 2008-09-26T12:40:20Z | [
"python"
] |
listing all functions in a python module | 139,180 | <p>I have a python module installed on my system and I'd like to be able to see what functions/classes/methods are available in it. </p>
<p>I want to call the doc function on each one. In ruby I can do something like ClassName.methods to get a list of all the methods available on that class. Is there something simil... | 164 | 2008-09-26T12:38:52Z | 139,198 | <p>The inspect module. Also see the <a href="http://docs.python.org/2/library/pydoc.html"><code>pydoc</code></a> module, the <code>help()</code> function in the interactive interpreter and the <code>pydoc</code> command-line tool which generates the documentation you are after. You can just give them the class you wish... | 69 | 2008-09-26T12:41:04Z | [
"python"
] |
listing all functions in a python module | 139,180 | <p>I have a python module installed on my system and I'd like to be able to see what functions/classes/methods are available in it. </p>
<p>I want to call the doc function on each one. In ruby I can do something like ClassName.methods to get a list of all the methods available on that class. Is there something simil... | 164 | 2008-09-26T12:38:52Z | 139,258 | <pre><code>import types
import yourmodule
print [yourmodule.__dict__.get(a) for a in dir(yourmodule)
if isinstance(yourmodule.__dict__.get(a), types.FunctionType)]
</code></pre>
| 44 | 2008-09-26T12:50:39Z | [
"python"
] |
listing all functions in a python module | 139,180 | <p>I have a python module installed on my system and I'd like to be able to see what functions/classes/methods are available in it. </p>
<p>I want to call the doc function on each one. In ruby I can do something like ClassName.methods to get a list of all the methods available on that class. Is there something simil... | 164 | 2008-09-26T12:38:52Z | 140,106 | <p>Once you've <code>import</code>ed the module, you can just do:</p>
<pre><code> help(modulename)
</code></pre>
<p>... To get the docs on all the functions at once, interactively. Or you can use:</p>
<pre><code> dir(modulename)
</code></pre>
<p>... To simply list the names of all the functions and variables defin... | 76 | 2008-09-26T15:08:54Z | [
"python"
] |
listing all functions in a python module | 139,180 | <p>I have a python module installed on my system and I'd like to be able to see what functions/classes/methods are available in it. </p>
<p>I want to call the doc function on each one. In ruby I can do something like ClassName.methods to get a list of all the methods available on that class. Is there something simil... | 164 | 2008-09-26T12:38:52Z | 142,501 | <p>This will do the trick:</p>
<pre><code>dir(module)
</code></pre>
<p>However, if you find it annoying to read the returned list, just use the following loop to get one name per line.</p>
<pre><code>for i in dir(module): print i
</code></pre>
| 20 | 2008-09-26T23:41:16Z | [
"python"
] |
listing all functions in a python module | 139,180 | <p>I have a python module installed on my system and I'd like to be able to see what functions/classes/methods are available in it. </p>
<p>I want to call the doc function on each one. In ruby I can do something like ClassName.methods to get a list of all the methods available on that class. Is there something simil... | 164 | 2008-09-26T12:38:52Z | 9,794,849 | <p>An example with inspect:</p>
<pre><code>from inspect import getmembers, isfunction
from my_project import my_module
functions_list = [o for o in getmembers(my_module) if isfunction(o[1])]
</code></pre>
<p>getmembers returns a list of (object_name, object_type) tuples.</p>
<p>You can replace isfunction with any o... | 37 | 2012-03-20T20:59:57Z | [
"python"
] |
listing all functions in a python module | 139,180 | <p>I have a python module installed on my system and I'd like to be able to see what functions/classes/methods are available in it. </p>
<p>I want to call the doc function on each one. In ruby I can do something like ClassName.methods to get a list of all the methods available on that class. Is there something simil... | 164 | 2008-09-26T12:38:52Z | 10,079,706 | <p><code>dir(module)</code> is the standard way when using a script or the standard interpreter, as mentioned in most answers.</p>
<p>However with an interactive python shell like <a href="http://ipython.org">IPython</a> you can use tab-completion to get an overview of all objects defined in the module.
This is much ... | 13 | 2012-04-09T20:51:58Z | [
"python"
] |
listing all functions in a python module | 139,180 | <p>I have a python module installed on my system and I'd like to be able to see what functions/classes/methods are available in it. </p>
<p>I want to call the doc function on each one. In ruby I can do something like ClassName.methods to get a list of all the methods available on that class. Is there something simil... | 164 | 2008-09-26T12:38:52Z | 11,173,131 | <p>It is not (or at least no longer) proper to use dir(module). The code should read like this:</p>
<pre><code>dir('module') or dir('modules')
</code></pre>
<p>Or you specify the module you want like this: <code>dir('sys')</code> to produce results from the module name sys. <code>dir()</code> returns errors while <... | -5 | 2012-06-23T21:29:31Z | [
"python"
] |
listing all functions in a python module | 139,180 | <p>I have a python module installed on my system and I'd like to be able to see what functions/classes/methods are available in it. </p>
<p>I want to call the doc function on each one. In ruby I can do something like ClassName.methods to get a list of all the methods available on that class. Is there something simil... | 164 | 2008-09-26T12:38:52Z | 30,584,102 | <p>None of these answers will work if you are unable to import said Python file without import errors. This was the case for me when I was inspecting a file which comes from a large code base with a lot of dependencies. The following will process the file as text and search for all method names that start with "def" an... | 0 | 2015-06-01T22:05:25Z | [
"python"
] |
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