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 |
|---|---|---|---|---|---|---|---|---|---|
How do I calculate the date six months from the current date using the datetime Python module? | 546,321 | <p>I am using the datetime Python module. I am looking to calculate the date 6 months from the current date. Could someone give me a little help doing this?</p>
<p>The reason I want to generate a date 6 months from the current date is to produce a Review Date. If the user enters data into the system it will have a r... | 143 | 2009-02-13T15:16:25Z | 35,474,438 | <p>Here's a example which allows the user to decide how to return a date where the day is greater than the number of days in the month.</p>
<pre><code>def add_months(date, months, endOfMonthBehaviour='RoundUp'):
assert endOfMonthBehaviour in ['RoundDown', 'RoundIn', 'RoundOut', 'RoundUp'], \
'Unknown end o... | 0 | 2016-02-18T06:32:43Z | [
"python",
"datetime"
] |
How Do I Perform Introspection on an Object in Python 2.x? | 546,337 | <p>I'm using Python 2.x and I have an object I'm summoning from the aether; the documentation on it is not particularly clear. I would like to be able to get a list of properties for that object and the type of each property. </p>
<p>Similarly, I'd like to get a list of methods for that object, as well, plus any oth... | 22 | 2009-02-13T15:22:50Z | 546,349 | <p>Well ... Your first stop will be a simple dir(object). This will show you all the object's members, both fields and methods. Try it in an interactive Python shell, and play around a little.</p>
<p>For instance:</p>
<pre><code>> class Foo:
def __init__(self):
self.a = "bar"
self.b = 4711
> a=Foo()... | 24 | 2009-02-13T15:27:23Z | [
"python",
"introspection",
"python-datamodel"
] |
How Do I Perform Introspection on an Object in Python 2.x? | 546,337 | <p>I'm using Python 2.x and I have an object I'm summoning from the aether; the documentation on it is not particularly clear. I would like to be able to get a list of properties for that object and the type of each property. </p>
<p>Similarly, I'd like to get a list of methods for that object, as well, plus any oth... | 22 | 2009-02-13T15:22:50Z | 546,366 | <p>How about something like:</p>
<pre><code>>>> o=object()
>>> [(a,type(o.__getattribute__(a))) for a in dir(o)]
[('__class__', <type 'type'>), ('__delattr__', <type 'method-wrapper'>),
('__doc__', <type 'str'>), ('__format__', <type 'builtin_function_or_method'>),
('__getatt... | 8 | 2009-02-13T15:31:19Z | [
"python",
"introspection",
"python-datamodel"
] |
How Do I Perform Introspection on an Object in Python 2.x? | 546,337 | <p>I'm using Python 2.x and I have an object I'm summoning from the aether; the documentation on it is not particularly clear. I would like to be able to get a list of properties for that object and the type of each property. </p>
<p>Similarly, I'd like to get a list of methods for that object, as well, plus any oth... | 22 | 2009-02-13T15:22:50Z | 546,372 | <p>"<a href="https://web.archive.org/web/20120926041111/http://www.ibm.com/developerworks/library/l-pyint/index.html" rel="nofollow">Guide to Python introspection</a>" is a nice article to get you started.</p>
| 6 | 2009-02-13T15:33:17Z | [
"python",
"introspection",
"python-datamodel"
] |
How Do I Perform Introspection on an Object in Python 2.x? | 546,337 | <p>I'm using Python 2.x and I have an object I'm summoning from the aether; the documentation on it is not particularly clear. I would like to be able to get a list of properties for that object and the type of each property. </p>
<p>Similarly, I'd like to get a list of methods for that object, as well, plus any oth... | 22 | 2009-02-13T15:22:50Z | 546,394 | <p>You could have a look at the <a href="http://docs.python.org/library/inspect.html" rel="nofollow">inspect module</a>. It provides a wide variety of tools for inspection of live objects as well as source code.</p>
| 2 | 2009-02-13T15:40:04Z | [
"python",
"introspection",
"python-datamodel"
] |
How Do I Perform Introspection on an Object in Python 2.x? | 546,337 | <p>I'm using Python 2.x and I have an object I'm summoning from the aether; the documentation on it is not particularly clear. I would like to be able to get a list of properties for that object and the type of each property. </p>
<p>Similarly, I'd like to get a list of methods for that object, as well, plus any oth... | 22 | 2009-02-13T15:22:50Z | 546,493 | <p>If you're using win32com.client.Dispatch, inspecting the Python object might not be much help as it's a generic wrapper for IDispatch. </p>
<p>You can use <a href="http://starship.python.net/crew/mhammond/win32/" rel="nofollow">makepy</a> (which comes with <a href="http://www.activestate.com" rel="nofollow">Active... | 0 | 2009-02-13T16:04:23Z | [
"python",
"introspection",
"python-datamodel"
] |
Generating lists/reports with in-line summaries in Django | 546,385 | <p>I am trying to write a view that will generate a report which displays all Items within my Inventory system, and provide summaries at a certain point. This report is purely just an HTML template by the way.</p>
<p>In my case, each Item is part of an Order. An Order can have several items, and I want to be able to d... | 5 | 2009-02-13T15:37:31Z | 546,429 | <p>You could compute the subtotals in Python in the Django view.</p>
<p>The sub-totals could be stored in instances of the Model object with an attribute indicating that it's a sub-total. To keep the report template simple you could insert the sub-total objects in the right places in the result list and use the sub-to... | 1 | 2009-02-13T15:48:08Z | [
"python",
"django",
"list",
"report"
] |
Generating lists/reports with in-line summaries in Django | 546,385 | <p>I am trying to write a view that will generate a report which displays all Items within my Inventory system, and provide summaries at a certain point. This report is purely just an HTML template by the way.</p>
<p>In my case, each Item is part of an Order. An Order can have several items, and I want to be able to d... | 5 | 2009-02-13T15:37:31Z | 546,435 | <p>Subtotals are <code>SELECT SUM(qty) GROUP BY order_number</code> things.</p>
<p>They are entirely separate from a query to get details.</p>
<p>The results of the two queries need to be interleaved. A good way to do this is to create each order as a tuple <code>( list_of_details, appropriate summary )</code>.</p>
... | 3 | 2009-02-13T15:49:36Z | [
"python",
"django",
"list",
"report"
] |
Generating lists/reports with in-line summaries in Django | 546,385 | <p>I am trying to write a view that will generate a report which displays all Items within my Inventory system, and provide summaries at a certain point. This report is purely just an HTML template by the way.</p>
<p>In my case, each Item is part of an Order. An Order can have several items, and I want to be able to d... | 5 | 2009-02-13T15:37:31Z | 546,650 | <p>Assuming you're not going to use any order-specific fields, you could perform single DB query followed by some python calculations:</p>
<pre><code>from itertools import groupby
items = OrderItem.objects.select_related('order').order_by('order').all() # order_by is essential
items_by_order = dict(groupby(items, lamb... | 1 | 2009-02-13T16:39:06Z | [
"python",
"django",
"list",
"report"
] |
Do OO design principles apply to Python? | 546,479 | <p>It seems like many OO discussions use Java or C# as examples (e.g. Head First Design Patterns).</p>
<p>Do these patterns apply equally to Python? Or if I follow the design patterns, will I just end up writing Java in Python (which apparently is a very bad thing)?</p>
| 24 | 2009-02-13T16:00:06Z | 546,495 | <p>The biggest differences are that Python is duck typed, meaning that you won't need to plan out class hierarchies in as much detail as in Java, and has first class functions. The strategy pattern, for example, becomes much simpler and more obvious when you can just pass a function in, rather than having to make inte... | 36 | 2009-02-13T16:04:41Z | [
"python",
"oop"
] |
Do OO design principles apply to Python? | 546,479 | <p>It seems like many OO discussions use Java or C# as examples (e.g. Head First Design Patterns).</p>
<p>Do these patterns apply equally to Python? Or if I follow the design patterns, will I just end up writing Java in Python (which apparently is a very bad thing)?</p>
| 24 | 2009-02-13T16:00:06Z | 546,502 | <p>It depends on the pattern. Some things are difficult to do in Python: Singleton is an example. You replace this pattern with another, such as, in the case of Singleton, Borg.<br>
It's not insane to use design patterns in Python-- the Iterator pattern, for instance, is integrated into the syntax. However, many things... | 4 | 2009-02-13T16:05:49Z | [
"python",
"oop"
] |
Do OO design principles apply to Python? | 546,479 | <p>It seems like many OO discussions use Java or C# as examples (e.g. Head First Design Patterns).</p>
<p>Do these patterns apply equally to Python? Or if I follow the design patterns, will I just end up writing Java in Python (which apparently is a very bad thing)?</p>
| 24 | 2009-02-13T16:00:06Z | 546,515 | <p>Python has it's own design idioms. Some of the standard patterns apply, others don't. Something like strategy or factories have in-language support that make them transparent. </p>
<p>For instance, with first-class types anything can be a factory. There's no need for a factory type, you can use the class directly t... | 12 | 2009-02-13T16:07:07Z | [
"python",
"oop"
] |
Do OO design principles apply to Python? | 546,479 | <p>It seems like many OO discussions use Java or C# as examples (e.g. Head First Design Patterns).</p>
<p>Do these patterns apply equally to Python? Or if I follow the design patterns, will I just end up writing Java in Python (which apparently is a very bad thing)?</p>
| 24 | 2009-02-13T16:00:06Z | 546,516 | <p>I'd say they apply to Python once you're already doing object-oriented programming with Python. Keep in mind that Python can do a lot more than OOP, and you should use common sense in choosing the appropriate paradigm for the job. If you decide that your program is best represented as a collection of objects, then s... | 1 | 2009-02-13T16:07:07Z | [
"python",
"oop"
] |
Do OO design principles apply to Python? | 546,479 | <p>It seems like many OO discussions use Java or C# as examples (e.g. Head First Design Patterns).</p>
<p>Do these patterns apply equally to Python? Or if I follow the design patterns, will I just end up writing Java in Python (which apparently is a very bad thing)?</p>
| 24 | 2009-02-13T16:00:06Z | 546,521 | <p>The use of Java or C# is probably due to the mainstream popularity of the language. </p>
<p>But design principle and/or design patterns apply irrespective of the language you use. The implementation of the same design pattern in Python would obviously be different than in Java or C#. </p>
| 0 | 2009-02-13T16:07:58Z | [
"python",
"oop"
] |
Do OO design principles apply to Python? | 546,479 | <p>It seems like many OO discussions use Java or C# as examples (e.g. Head First Design Patterns).</p>
<p>Do these patterns apply equally to Python? Or if I follow the design patterns, will I just end up writing Java in Python (which apparently is a very bad thing)?</p>
| 24 | 2009-02-13T16:00:06Z | 546,569 | <p>yes, of course they apply. But as noted above, many patterns are built into the language, or made irrelevant by higher level features of the language.</p>
| 1 | 2009-02-13T16:19:05Z | [
"python",
"oop"
] |
Do OO design principles apply to Python? | 546,479 | <p>It seems like many OO discussions use Java or C# as examples (e.g. Head First Design Patterns).</p>
<p>Do these patterns apply equally to Python? Or if I follow the design patterns, will I just end up writing Java in Python (which apparently is a very bad thing)?</p>
| 24 | 2009-02-13T16:00:06Z | 546,612 | <p>Design patterns are little more than duct-tape to fix a languages deficiencies.</p>
| 4 | 2009-02-13T16:30:20Z | [
"python",
"oop"
] |
Do OO design principles apply to Python? | 546,479 | <p>It seems like many OO discussions use Java or C# as examples (e.g. Head First Design Patterns).</p>
<p>Do these patterns apply equally to Python? Or if I follow the design patterns, will I just end up writing Java in Python (which apparently is a very bad thing)?</p>
| 24 | 2009-02-13T16:00:06Z | 546,657 | <p>On further thought, some patterns, such as Borg, may be more specific to Python (though similar things can be said about other patterns and languages).</p>
<p>The iterator pattern is also used in Python, albeit in a slightly different form.</p>
<p>Duncan Booth has written <a href="http://www.suttoncourtenay.org.uk... | 3 | 2009-02-13T16:40:54Z | [
"python",
"oop"
] |
Do OO design principles apply to Python? | 546,479 | <p>It seems like many OO discussions use Java or C# as examples (e.g. Head First Design Patterns).</p>
<p>Do these patterns apply equally to Python? Or if I follow the design patterns, will I just end up writing Java in Python (which apparently is a very bad thing)?</p>
| 24 | 2009-02-13T16:00:06Z | 549,327 | <p><strong>Short answer:</strong> Yes; Python is an OO language.</p>
<p><strong>Slightly longer answer:</strong> Yes; you can <em>design</em> using OO principles and then <em>implement</em> in any language (even assembler).</p>
<blockquote>
<p>The benefit of using an OO language is that it incorporates support for ... | 4 | 2009-02-14T16:26:51Z | [
"python",
"oop"
] |
Do OO design principles apply to Python? | 546,479 | <p>It seems like many OO discussions use Java or C# as examples (e.g. Head First Design Patterns).</p>
<p>Do these patterns apply equally to Python? Or if I follow the design patterns, will I just end up writing Java in Python (which apparently is a very bad thing)?</p>
| 24 | 2009-02-13T16:00:06Z | 2,106,180 | <p>Yes, you can use plenty of design patterns in Python. A design pattern is just a repeatable implementation of a higher level task. The reason why Python & design patterns don't work the same as other languages is because Python includes most of the basic patterns built in. This means that patterns that emerge in... | 0 | 2010-01-21T00:51:02Z | [
"python",
"oop"
] |
How can I split a file in python? | 546,508 | <p>Is it possible to split a file? For example you have huge wordlist, I want to split it so that it becomes more than one file. How is this possible? </p>
| 8 | 2009-02-13T16:06:29Z | 546,535 | <p>Sure it's possible:</p>
<pre><code>open input file
open output file 1
count = 0
for each line in file:
write to output file
count = count + 1
if count > maxlines:
close output file
open next output file
count = 0
</code></pre>
| 2 | 2009-02-13T16:10:36Z | [
"python"
] |
How can I split a file in python? | 546,508 | <p>Is it possible to split a file? For example you have huge wordlist, I want to split it so that it becomes more than one file. How is this possible? </p>
| 8 | 2009-02-13T16:06:29Z | 546,561 | <p>This one splits a file up by newlines and writes it back out. You can change the delimiter easily. This can also handle uneven amounts as well, if you don't have a multiple of splitLen lines (20 in this example) in your input file.</p>
<pre><code>splitLen = 20 # 20 lines per file
outputBase = 'output' # out... | 13 | 2009-02-13T16:17:41Z | [
"python"
] |
How can I split a file in python? | 546,508 | <p>Is it possible to split a file? For example you have huge wordlist, I want to split it so that it becomes more than one file. How is this possible? </p>
| 8 | 2009-02-13T16:06:29Z | 6,389,813 | <p>Solution to split binary files into chapters .000, .001, etc.:</p>
<pre><code>FILE = 'scons-conversion.7z'
MAX = 500*1024*1024 # 500Mb - max chapter size
BUF = 50*1024*1024 # 50GB - memory buffer size
chapters = 0
uglybuf = ''
with open(FILE, 'rb') as src:
while True:
tgt = open(FILE+'.%03d' % chapte... | 5 | 2011-06-17T17:58:58Z | [
"python"
] |
How can I split a file in python? | 546,508 | <p>Is it possible to split a file? For example you have huge wordlist, I want to split it so that it becomes more than one file. How is this possible? </p>
| 8 | 2009-02-13T16:06:29Z | 13,345,290 | <p>A better loop for sli's example, not hogging memory :</p>
<pre><code>splitLen = 20 # 20 lines per file
outputBase = 'output' # output.1.txt, output.2.txt, etc.
input = open('input.txt', 'r')
count = 0
at = 0
dest = None
for line in input:
if count % splitLen == 0:
if dest: dest.close()
... | 8 | 2012-11-12T14:15:35Z | [
"python"
] |
How can I split a file in python? | 546,508 | <p>Is it possible to split a file? For example you have huge wordlist, I want to split it so that it becomes more than one file. How is this possible? </p>
| 8 | 2009-02-13T16:06:29Z | 15,375,536 | <pre><code>def split_file(file, prefix, max_size, buffer=1024):
"""
file: the input file
prefix: prefix of the output files that will be created
max_size: maximum size of each created file in bytes
buffer: buffer size in bytes
Returns the number of parts created.
"""
with open(file, 'r+... | 2 | 2013-03-13T01:38:40Z | [
"python"
] |
Multiple-instance Django forum software | 546,753 | <p>Does anyone know of a django forum plugin that allows each member to have his own forum? If there isn't anything, than what would be the best way to accomplish this with a "regular" forum plugin for Django?</p>
| 2 | 2009-02-13T17:01:22Z | 546,816 | <p>Check out <a href="http://djangoplugables.com/projects/diamanda/" rel="nofollow">diamanda</a>. I'm not sure it does what you need as far as the each user having its forums, but that's probably not too hard to hack on top. Probably as simple as adding a few ForeignKeys into auth.User to the diamanda models. In gene... | 0 | 2009-02-13T17:16:50Z | [
"python",
"django",
"forum"
] |
Multiple-instance Django forum software | 546,753 | <p>Does anyone know of a django forum plugin that allows each member to have his own forum? If there isn't anything, than what would be the best way to accomplish this with a "regular" forum plugin for Django?</p>
| 2 | 2009-02-13T17:01:22Z | 548,988 | <p>I once created a <a href="http://code.djangoproject.com/wiki/ForumAppsComparison" rel="nofollow">feature matrix of all Django forum apps I could find. It might be a bit outdated now, though (contributions welcome).</p>
<p>At least django-threadedcomments</a> uses generic foreign keys, so you can attach a message th... | 4 | 2009-02-14T11:45:31Z | [
"python",
"django",
"forum"
] |
Multiple-instance Django forum software | 546,753 | <p>Does anyone know of a django forum plugin that allows each member to have his own forum? If there isn't anything, than what would be the best way to accomplish this with a "regular" forum plugin for Django?</p>
| 2 | 2009-02-13T17:01:22Z | 552,302 | <p>I believe the <a href="http://sct.sphene.net/wiki/show/Board/" rel="nofollow">Sphene Community Tools</a> can do this.</p>
| 0 | 2009-02-16T04:59:15Z | [
"python",
"django",
"forum"
] |
Multiple-instance Django forum software | 546,753 | <p>Does anyone know of a django forum plugin that allows each member to have his own forum? If there isn't anything, than what would be the best way to accomplish this with a "regular" forum plugin for Django?</p>
| 2 | 2009-02-13T17:01:22Z | 881,457 | <p>Yep, the <a href="http://sct.sphene.net/" rel="nofollow">forum app of SCT</a> can be used for this - simply set it up and create multiple "community Groups" (these are similar to vhosts) and map them to subdomains - each community group would have separate forum categories, can have separate templates, separate user... | 1 | 2009-05-19T07:52:41Z | [
"python",
"django",
"forum"
] |
Multiple-instance Django forum software | 546,753 | <p>Does anyone know of a django forum plugin that allows each member to have his own forum? If there isn't anything, than what would be the best way to accomplish this with a "regular" forum plugin for Django?</p>
| 2 | 2009-02-13T17:01:22Z | 3,921,625 | <p>Look at <a href="http://djangobb.org/" rel="nofollow">DjangoBB</a>.</p>
| 2 | 2010-10-13T07:38:35Z | [
"python",
"django",
"forum"
] |
Send Info from Script to Module Python | 547,450 | <p>Hi I wonder how you can send info over to a module </p>
<p>An Example
main.py Looks like this</p>
<pre><code>from module import *
print helloworld()
</code></pre>
<p>module.py looks like this</p>
<pre><code>def helloworld():
print "Hello world!"
</code></pre>
<p>Anyway i want to send over info from main... | 2 | 2009-02-13T19:59:51Z | 547,462 | <p>It is not clear what you mean by "send info", but if you but the typical way of passing a value would be with a function parameter.</p>
<p>main.py:</p>
<pre><code>helloworld("Hello world!")
</code></pre>
<p>module.py</p>
<pre><code>def helloworld(message):
print message
</code></pre>
<p>Is that what your lo... | 1 | 2009-02-13T20:05:05Z | [
"python"
] |
Send Info from Script to Module Python | 547,450 | <p>Hi I wonder how you can send info over to a module </p>
<p>An Example
main.py Looks like this</p>
<pre><code>from module import *
print helloworld()
</code></pre>
<p>module.py looks like this</p>
<pre><code>def helloworld():
print "Hello world!"
</code></pre>
<p>Anyway i want to send over info from main... | 2 | 2009-02-13T19:59:51Z | 547,471 | <p>Yes. You can either send over information when calling functions/classes in module, or you can assign values in module's namespace (not so preferable).</p>
<p>As an example:</p>
<pre><code># module.py
# good example
def helloworld(name):
print "Hello, %s" % name
# main.py
# good example
import module
module.h... | 1 | 2009-02-13T20:08:24Z | [
"python"
] |
dead simple Django file uploading not working :-(( | 547,743 | <p>I am trying desperately to do a very simple file upload with Django, without (for now) bothering with templating & co.</p>
<p>My HTML is:</p>
<pre><code> <form
id="uploader"
action="bytes/"
enctype="multipart/form-data"
method="post"
>
<input type="file" name="upload... | 5 | 2009-02-13T21:19:39Z | 548,175 | <p>Try changing "<code>if 'uploaded' in request.FILES:</code>" to "<code>if request.FILES</code>".</p>
<p>You might want to take a look at the documentation as well; there's an example-- <a href="http://docs.djangoproject.com/en/dev/topics/http/file-uploads/" rel="nofollow">http://docs.djangoproject.com/en/dev/topics/... | 6 | 2009-02-14T00:04:35Z | [
"python",
"django",
"upload"
] |
Python using result of function for Regular Expression Substitution | 547,798 | <p>I have a block of text, and for every regex match, I want to substitute that match with the return value from another function. The argument to this function is of course the matched text.</p>
<p>I have been having trouble trying to come up with a one pass solution to this problem. It feels like it should be pret... | 5 | 2009-02-13T21:38:30Z | 547,817 | <p>Right from <a href="http://docs.python.org/library/re.html#re.sub">the documentation</a>:</p>
<pre><code>>>> def dashrepl(matchobj):
... if matchobj.group(0) == '-': return ' '
... else: return '-'
>>> re.sub('-{1,2}', dashrepl, 'pro----gram-files')
'pro--gram files'
</code></pre>
| 14 | 2009-02-13T21:45:58Z | [
"python",
"regex"
] |
Python using result of function for Regular Expression Substitution | 547,798 | <p>I have a block of text, and for every regex match, I want to substitute that match with the return value from another function. The argument to this function is of course the matched text.</p>
<p>I have been having trouble trying to come up with a one pass solution to this problem. It feels like it should be pret... | 5 | 2009-02-13T21:38:30Z | 547,822 | <p>Python-agnostic: Match everything before and everything after your text to replace.</p>
<pre><code>/^(.*?)(your regexp to match)(.*)$/
</code></pre>
<p>Then you have the next before and after the text you're going to replace. The rest is easy -- just insert the result of your function between the two strings.</p... | 0 | 2009-02-13T21:47:22Z | [
"python",
"regex"
] |
How to dynamically load a Python class | 547,829 | <p>Given a string of a Python class, e.g. <code>my_package.my_module.MyClass</code>, what is the best possible way to load it?</p>
<p>In other words I am looking for a equivalent <code>Class.forName()</code> in Java, function in Python. It needs to work on Google App Engine.</p>
<p>Preferably this would be a function... | 74 | 2009-02-13T21:49:04Z | 547,865 | <pre><code>module = __import__("my_package/my_module")
the_class = getattr(module, "MyClass")
obj = the_class()
</code></pre>
| -3 | 2009-02-13T22:01:44Z | [
"python",
"reflection",
"python-import"
] |
How to dynamically load a Python class | 547,829 | <p>Given a string of a Python class, e.g. <code>my_package.my_module.MyClass</code>, what is the best possible way to load it?</p>
<p>In other words I am looking for a equivalent <code>Class.forName()</code> in Java, function in Python. It needs to work on Google App Engine.</p>
<p>Preferably this would be a function... | 74 | 2009-02-13T21:49:04Z | 547,867 | <p>From the python documentation, here's the function you want:</p>
<pre><code>def my_import(name):
components = name.split('.')
mod = __import__(components[0])
for comp in components[1:]:
mod = getattr(mod, comp)
return mod
</code></pre>
<p>The reason a simple <code>__import__</code> won't wo... | 109 | 2009-02-13T22:02:57Z | [
"python",
"reflection",
"python-import"
] |
How to dynamically load a Python class | 547,829 | <p>Given a string of a Python class, e.g. <code>my_package.my_module.MyClass</code>, what is the best possible way to load it?</p>
<p>In other words I am looking for a equivalent <code>Class.forName()</code> in Java, function in Python. It needs to work on Google App Engine.</p>
<p>Preferably this would be a function... | 74 | 2009-02-13T21:49:04Z | 8,255,024 | <pre><code>def import_class(cl):
d = cl.rfind(".")
classname = cl[d+1:len(cl)]
m = __import__(cl[0:d], globals(), locals(), [classname])
return getattr(m, classname)
</code></pre>
| 23 | 2011-11-24T09:49:03Z | [
"python",
"reflection",
"python-import"
] |
How to dynamically load a Python class | 547,829 | <p>Given a string of a Python class, e.g. <code>my_package.my_module.MyClass</code>, what is the best possible way to load it?</p>
<p>In other words I am looking for a equivalent <code>Class.forName()</code> in Java, function in Python. It needs to work on Google App Engine.</p>
<p>Preferably this would be a function... | 74 | 2009-02-13T21:49:04Z | 19,228,066 | <pre><code>import importlib
module = importlib.import_module('my_package.my_module')
my_class = getattr(module, 'MyClass')
my_instance = my_class()
</code></pre>
| 28 | 2013-10-07T14:55:19Z | [
"python",
"reflection",
"python-import"
] |
How to dynamically load a Python class | 547,829 | <p>Given a string of a Python class, e.g. <code>my_package.my_module.MyClass</code>, what is the best possible way to load it?</p>
<p>In other words I am looking for a equivalent <code>Class.forName()</code> in Java, function in Python. It needs to work on Google App Engine.</p>
<p>Preferably this would be a function... | 74 | 2009-02-13T21:49:04Z | 24,815,361 | <p>If you don't want to roll your own, there is a function available in the <code>pydoc</code> module that does exactly this:</p>
<pre><code>from pydoc import locate
my_class = locate('my_package.my_module.MyClass')
</code></pre>
<p>The advantage of this approach over the others listed here is that <code>locate</code... | 44 | 2014-07-17T23:52:06Z | [
"python",
"reflection",
"python-import"
] |
How to dynamically load a Python class | 547,829 | <p>Given a string of a Python class, e.g. <code>my_package.my_module.MyClass</code>, what is the best possible way to load it?</p>
<p>In other words I am looking for a equivalent <code>Class.forName()</code> in Java, function in Python. It needs to work on Google App Engine.</p>
<p>Preferably this would be a function... | 74 | 2009-02-13T21:49:04Z | 26,277,655 | <p>In Google App Engine there is a <code>webapp2</code> function called <code>import_string</code>. For more info see here:<a href="https://webapp-improved.appspot.com/api/webapp2.html" rel="nofollow">https://webapp-improved.appspot.com/api/webapp2.html</a></p>
<p>So,</p>
<pre><code>import webapp2
my_class = webapp2.... | -1 | 2014-10-09T11:47:00Z | [
"python",
"reflection",
"python-import"
] |
Creating an inheritable Python type with PyCxx | 548,442 | <p>A friend and I have been toying around with various Python C++ wrappers lately, trying to find one that meets the needs of both some professional and hobby projects. We've both honed in on <a href="http://cxx.sourceforge.net/" rel="nofollow">PyCxx</a> as a good balance between being lightweight and easy to interface... | 3 | 2009-02-14T03:44:08Z | 551,927 | <p>I've only done a tiny bit of work with PyCxx, and I'm not at a compiler, but I suspect what you're seeing is similar to the following situation, as expressed in pure Python:</p>
<pre><code>>>> class C(object):
... def __getattribute__(self, key):
... print 'C', key
...
>>> class D(C):
... ... | 1 | 2009-02-16T00:35:00Z | [
"python",
"python-c-api",
"pycxx"
] |
Creating an inheritable Python type with PyCxx | 548,442 | <p>A friend and I have been toying around with various Python C++ wrappers lately, trying to find one that meets the needs of both some professional and hobby projects. We've both honed in on <a href="http://cxx.sourceforge.net/" rel="nofollow">PyCxx</a> as a good balance between being lightweight and easy to interface... | 3 | 2009-02-14T03:44:08Z | 554,810 | <p>You must declare <code>kitty</code> as <code>class new_style_class: public Py::PythonClass< new_style_class ></code>. See <code>simple.cxx</code> and the Python test case at <a href="http://cxx.svn.sourceforge.net/viewvc/cxx/trunk/CXX/Demo/Python3/" rel="nofollow">http://cxx.svn.sourceforge.net/viewvc/cxx/trun... | 3 | 2009-02-16T22:17:13Z | [
"python",
"python-c-api",
"pycxx"
] |
jcc.initVM() doesn't return when mod_wsgi is configured as daemon mode | 548,493 | <p>I am using mod-wsgi with django, and in django I use pylucene to do full text search.</p>
<p>While mod-wsgi is configured to be embedded mode, there is no problem at all.
But when mod-wsgi is configured to be daemon mode, the apache just gets stuck,
and the browser just keep loading but nothing appears.</p>
<p>Th... | 3 | 2009-02-14T04:39:28Z | 555,382 | <p>Please refer to <a href="http://code.google.com/p/modwsgi/issues/detail?id=131" rel="nofollow">http://code.google.com/p/modwsgi/issues/detail?id=131</a> for the discussion details. </p>
<p>In short, the
mod_wsgi will block signals for the daemon program, which may make initVM doesn't work. Furthermore according to... | 1 | 2009-02-17T02:45:56Z | [
"python",
"apache",
"mod-wsgi",
"pylucene",
"jcc"
] |
jcc.initVM() doesn't return when mod_wsgi is configured as daemon mode | 548,493 | <p>I am using mod-wsgi with django, and in django I use pylucene to do full text search.</p>
<p>While mod-wsgi is configured to be embedded mode, there is no problem at all.
But when mod-wsgi is configured to be daemon mode, the apache just gets stuck,
and the browser just keep loading but nothing appears.</p>
<p>Th... | 3 | 2009-02-14T04:39:28Z | 1,042,036 | <p>The fix for this problem was included in mod_wsgi 2.4.</p>
| 1 | 2009-06-25T03:31:51Z | [
"python",
"apache",
"mod-wsgi",
"pylucene",
"jcc"
] |
SQLAlchemy and empty columns | 548,952 | <p>When I try to insert a new record into the database using SQLAlchemy and I don't fill out all values, it tries to insert them as "None" (instead of omitting them). It then complains about "can't be null" errors. Is there a way to have it just omit columns from the sql query if I also omitted them when declaring the ... | 9 | 2009-02-14T11:14:06Z | 548,958 | <p>This is a database schema issue, not an SQLAlchemy issue. If your database schema has a column which cannot be NULL, you must put something (i.e. not None) into there. Or change your schema to allow NULL in those columns.</p>
<p>Wikipedia has an article <a href="http://en.wikipedia.org/wiki/Null_(SQL)">about NULL</... | 12 | 2009-02-14T11:26:35Z | [
"python",
"database-design",
"sqlalchemy"
] |
SQLAlchemy and empty columns | 548,952 | <p>When I try to insert a new record into the database using SQLAlchemy and I don't fill out all values, it tries to insert them as "None" (instead of omitting them). It then complains about "can't be null" errors. Is there a way to have it just omit columns from the sql query if I also omitted them when declaring the ... | 9 | 2009-02-14T11:14:06Z | 549,022 | <p>To add to the answer from Ali A, this means you need to have <code>nullable=True</code> in your column definition, so that NULL is allowed in the column. For example:</p>
<pre><code>email_address = Column(String, nullable=True)
</code></pre>
<p><a href="http://sqlalchemy.readthedocs.org/en/rel_1_0/core/metadata.ht... | 25 | 2009-02-14T12:11:20Z | [
"python",
"database-design",
"sqlalchemy"
] |
Delete Chars in Python | 549,130 | <p>does anybody know how to delete all characters behind a specific character??</p>
<p>like this:</p>
<pre><code>http://google.com/translate_t
</code></pre>
<p>into </p>
<pre><code>http://google.com
</code></pre>
| 2 | 2009-02-14T13:46:31Z | 549,133 | <pre><code>str="http://google.com/translate_t"
shortened=str[0:str.rfind("/")]
</code></pre>
<p>Should do it. str[a:b] returns a substring in python. And rfind is used to find the index of a character sequence, starting at the end of the string.</p>
| 2 | 2009-02-14T13:50:19Z | [
"python",
"text-processing"
] |
Delete Chars in Python | 549,130 | <p>does anybody know how to delete all characters behind a specific character??</p>
<p>like this:</p>
<pre><code>http://google.com/translate_t
</code></pre>
<p>into </p>
<pre><code>http://google.com
</code></pre>
| 2 | 2009-02-14T13:46:31Z | 549,138 | <p>If you know the position of the character then you can use the slice syntax to to create a new string:</p>
<pre><code>In [2]: s1 = "abc123"
In [3]: s2 = s1[:3]
In [4]: print s2
abc
</code></pre>
<p>To find the position you can use the <code>find()</code> or <code>index()</code> methods of strings.
The <code>split(... | 2 | 2009-02-14T13:54:11Z | [
"python",
"text-processing"
] |
Delete Chars in Python | 549,130 | <p>does anybody know how to delete all characters behind a specific character??</p>
<p>like this:</p>
<pre><code>http://google.com/translate_t
</code></pre>
<p>into </p>
<pre><code>http://google.com
</code></pre>
| 2 | 2009-02-14T13:46:31Z | 549,140 | <p>if you're asking about an abstract string and not url you could go with:</p>
<pre><code>>>> astring ="http://google.com/translate_t"
>>> astring.rpartition('/')[0]
http://google.com
</code></pre>
| 6 | 2009-02-14T13:54:24Z | [
"python",
"text-processing"
] |
Delete Chars in Python | 549,130 | <p>does anybody know how to delete all characters behind a specific character??</p>
<p>like this:</p>
<pre><code>http://google.com/translate_t
</code></pre>
<p>into </p>
<pre><code>http://google.com
</code></pre>
| 2 | 2009-02-14T13:46:31Z | 549,184 | <p>For urls, using <a href="http://docs.python.org/library/urlparse.html" rel="nofollow">urlparse</a>:</p>
<pre><code>>>> import urlparse
>>> parts = urlparse.urlsplit('http://google.com/path/to/resource?query=spam#anchor')
>>> parts
('http', 'google.com', '/path/to/resource', 'query=spam', ... | 5 | 2009-02-14T14:32:38Z | [
"python",
"text-processing"
] |
In the windows python console, how to make Tab = four spaces? | 549,340 | <p>Hello I would like that when I am in the python
console tabbing will give me four spaces. Any ideas? </p>
| 0 | 2009-02-14T16:38:44Z | 549,362 | <ol>
<li>Download and install <a href="http://www.autohotkey.com" rel="nofollow">AutoHotkey</a></li>
<li><p>Write this script:</p>
<pre><code>SetTitleMatchMode 2
#IfWinActive python
tab::
Send, {SPACE}
Send, {SPACE}
Send, {SPACE}
Send, {SPACE}
</code></pre></li>
</ol>
<p>Save it as tab-to-space.ahk, and doubleclick o... | 5 | 2009-02-14T16:54:08Z | [
"python",
"windows"
] |
Python 3.0 smtplib | 549,391 | <p>I have a very simple piece of code that I used in previous versions of Python without issues (version 2.5 and prior). Now with 3.0, the following code give the error on the login line "argument 1 must be string or buffer, not str".</p>
<pre><code>import smtplib
smtpserver = 'mail.somedomain.com'
AUTHREQUIRE... | 3 | 2009-02-14T17:20:58Z | 549,491 | <pre><code>Traceback (most recent call last):
File "smtptest.py", line 18, in <module>
session.login(smtpuser, smtppass)
File "c:\Python30\lib\smtplib.py", line 580, in login
AUTH_PLAIN + " " + encode_plain(user, password))
File "c:\Python30\lib\smtplib.py", line 545, in encode_plain
return enco... | 3 | 2009-02-14T18:21:05Z | [
"python",
"python-3.x"
] |
Python 3.0 smtplib | 549,391 | <p>I have a very simple piece of code that I used in previous versions of Python without issues (version 2.5 and prior). Now with 3.0, the following code give the error on the login line "argument 1 must be string or buffer, not str".</p>
<pre><code>import smtplib
smtpserver = 'mail.somedomain.com'
AUTHREQUIRE... | 3 | 2009-02-14T17:20:58Z | 549,643 | <p><strong>UPDATE</strong>: just noticed from a look at the bug tracker there's a suggested fix also: </p>
<p>Edit smtplib.py and replace the existing <code>encode_plain()</code> definition with this: </p>
<pre><code>def encode_plain(user, password):
s = "\0%s\0%s" % (user, password)
return encode_base64(s.en... | 4 | 2009-02-14T19:29:28Z | [
"python",
"python-3.x"
] |
Python 3.0 smtplib | 549,391 | <p>I have a very simple piece of code that I used in previous versions of Python without issues (version 2.5 and prior). Now with 3.0, the following code give the error on the login line "argument 1 must be string or buffer, not str".</p>
<pre><code>import smtplib
smtpserver = 'mail.somedomain.com'
AUTHREQUIRE... | 3 | 2009-02-14T17:20:58Z | 594,026 | <p>As a variation on Jay's answer, rather than edit smtplib.py you could "monkey patch" it at run time.</p>
<p>Put this somewhere in your code:</p>
<pre><code>
def encode_plain(user, password):
s = "\0%s\0%s" % (user, password)
return encode_base64(s.encode('ascii'), eol='')
import smtplib
encode_plain.func_... | 2 | 2009-02-27T08:58:02Z | [
"python",
"python-3.x"
] |
Python 3.0 smtplib | 549,391 | <p>I have a very simple piece of code that I used in previous versions of Python without issues (version 2.5 and prior). Now with 3.0, the following code give the error on the login line "argument 1 must be string or buffer, not str".</p>
<pre><code>import smtplib
smtpserver = 'mail.somedomain.com'
AUTHREQUIRE... | 3 | 2009-02-14T17:20:58Z | 1,062,307 | <p>This issue has been addressed in Python3.1. Get the update at <a href="http://www.python.org/download/releases/3.1/" rel="nofollow">http://www.python.org/download/releases/3.1/</a></p>
| 0 | 2009-06-30T07:52:24Z | [
"python",
"python-3.x"
] |
Simple unique non-priority queue system | 549,536 | <p>I'm working on a simple web crawler in python and I wan't to make a simple queue class, but I'm not quite sure the best way to start. I want something that holds only unique items to process, so that the crawler will only crawl each page once per script run (simply to avoid infinite looping). Can anyone give me or p... | 1 | 2009-02-14T18:44:53Z | 549,543 | <p>I'd just use a set, it doesn't maintain order but it will help you maintain uniqueness:</p>
<pre><code>>>> q = set([9, 8, 7, 7, 8, 5, 4, 1])
>>> q.pop()
1
>>> q.pop()
4
>>> q.pop()
5
>>> q.add(3)
>>> q.add(3)
>>> q.add(3)
>>> q.add(3)
>>&... | 4 | 2009-02-14T18:48:41Z | [
"python",
"queue"
] |
Simple unique non-priority queue system | 549,536 | <p>I'm working on a simple web crawler in python and I wan't to make a simple queue class, but I'm not quite sure the best way to start. I want something that holds only unique items to process, so that the crawler will only crawl each page once per script run (simply to avoid infinite looping). Can anyone give me or p... | 1 | 2009-02-14T18:44:53Z | 549,555 | <p>Why not use a list if you need order (or even a heapq, as was formerly suggested by zacherates before a set was suggested instead) and also use a set to check for duplicates?</p>
| 1 | 2009-02-14T18:54:19Z | [
"python",
"queue"
] |
Simple unique non-priority queue system | 549,536 | <p>I'm working on a simple web crawler in python and I wan't to make a simple queue class, but I'm not quite sure the best way to start. I want something that holds only unique items to process, so that the crawler will only crawl each page once per script run (simply to avoid infinite looping). Can anyone give me or p... | 1 | 2009-02-14T18:44:53Z | 549,564 | <p>A very simple example would be to stuff each item's URL into a dict, but as the key, not as the value. Then only process the next item if it's url is not in that dict's keys:</p>
<pre><code>visited = {}
# grab next url from somewhere
if url not in visited.keys():
# process url
visited[url] = 1 # or whatever, th... | 2 | 2009-02-14T18:57:16Z | [
"python",
"queue"
] |
Simple unique non-priority queue system | 549,536 | <p>I'm working on a simple web crawler in python and I wan't to make a simple queue class, but I'm not quite sure the best way to start. I want something that holds only unique items to process, so that the crawler will only crawl each page once per script run (simply to avoid infinite looping). Can anyone give me or p... | 1 | 2009-02-14T18:44:53Z | 549,591 | <p>If I understand correctly, you want to visit each page only once. I think the best way to do this would be to keep a queue of pages still to visit, and a set of visited pages. The problem with the other posted solution is that once you pop a page from the queue, you no longer have a record of whether or not you've b... | 2 | 2009-02-14T19:10:31Z | [
"python",
"queue"
] |
Simple unique non-priority queue system | 549,536 | <p>I'm working on a simple web crawler in python and I wan't to make a simple queue class, but I'm not quite sure the best way to start. I want something that holds only unique items to process, so that the crawler will only crawl each page once per script run (simply to avoid infinite looping). Can anyone give me or p... | 1 | 2009-02-14T18:44:53Z | 549,823 | <p>I would extend the list class to add unique-testing code to whatever methods of the list you are using. This could range from simply adding a <code>.append_unique(item)</code> to the class, or overriding all of <code>append</code>, <code>insert</code>, <code>extend</code>, <code>__setitem__</code>, <code>__setslice_... | 0 | 2009-02-14T21:17:40Z | [
"python",
"queue"
] |
Skipping Iterations in Python | 549,674 | <p>I have a loop going, but there is the possibility for exceptions to be raised inside the loop. This of course would stop my program all together. To prevent that I catch the exceptions and handle them. But then the rest of the iteration runs even though an exception occurred. Is there a keyword to use in my <code>ex... | 42 | 2009-02-14T19:48:04Z | 549,680 | <p>Something like this?</p>
<pre><code>for i in xrange( someBigNumber ):
try:
doSomethingThatMightFail()
except SomeException, e:
continue
doSomethingWhenNothingFailed()
</code></pre>
| 10 | 2009-02-14T19:50:18Z | [
"python",
"iteration",
"skip"
] |
Skipping Iterations in Python | 549,674 | <p>I have a loop going, but there is the possibility for exceptions to be raised inside the loop. This of course would stop my program all together. To prevent that I catch the exceptions and handle them. But then the rest of the iteration runs even though an exception occurred. Is there a keyword to use in my <code>ex... | 42 | 2009-02-14T19:48:04Z | 549,682 | <p>You are lookin for <a href="http://docs.python.org/tutorial/controlflow.html">continue</a>.</p>
| 94 | 2009-02-14T19:50:46Z | [
"python",
"iteration",
"skip"
] |
Skipping Iterations in Python | 549,674 | <p>I have a loop going, but there is the possibility for exceptions to be raised inside the loop. This of course would stop my program all together. To prevent that I catch the exceptions and handle them. But then the rest of the iteration runs even though an exception occurred. Is there a keyword to use in my <code>ex... | 42 | 2009-02-14T19:48:04Z | 549,683 | <p>I think you're looking for <a href="http://www.network-theory.co.uk/docs/pytut/breakandcontinueStatements.html">continue</a></p>
| 5 | 2009-02-14T19:51:02Z | [
"python",
"iteration",
"skip"
] |
Skipping Iterations in Python | 549,674 | <p>I have a loop going, but there is the possibility for exceptions to be raised inside the loop. This of course would stop my program all together. To prevent that I catch the exceptions and handle them. But then the rest of the iteration runs even though an exception occurred. Is there a keyword to use in my <code>ex... | 42 | 2009-02-14T19:48:04Z | 549,688 | <pre><code>for i in iterator:
try:
# Do something.
pass
except:
# Continue to next iteration.
continue
</code></pre>
| 26 | 2009-02-14T19:52:29Z | [
"python",
"iteration",
"skip"
] |
Skipping Iterations in Python | 549,674 | <p>I have a loop going, but there is the possibility for exceptions to be raised inside the loop. This of course would stop my program all together. To prevent that I catch the exceptions and handle them. But then the rest of the iteration runs even though an exception occurred. Is there a keyword to use in my <code>ex... | 42 | 2009-02-14T19:48:04Z | 35,441,469 | <p>For this specific use-case using <code>try..except..else</code> is the cleanest solution, the <code>else</code> clause will be executed if no exception was raised. </p>
<p>NOTE: The <code>else</code> clause must follow all <code>except</code> clauses</p>
<pre><code>for i in iterator:
try:
# Do somethin... | 0 | 2016-02-16T19:31:13Z | [
"python",
"iteration",
"skip"
] |
Fully transparent windows in Pygame? | 550,001 | <p>Is it possible to get a fully transparent window in Pygame (see the desktop through it)? I've found how to create a window without a frame, but there doesn't seem to be any obvious way to make it transparent.</p>
<p>I'd be willing to tie into system-specific technology/frameworks as long as there are solutions for... | 4 | 2009-02-14T23:40:50Z | 550,007 | <p>PyGame uses SDL, which does not support transparent windows. Although at least on Linux making it transparent is done by the window manager, not the application. </p>
| 7 | 2009-02-14T23:48:12Z | [
"python",
"graphics",
"sdl",
"pygame"
] |
Parsing "From" addresses from email text | 550,009 | <p>I'm trying to extract email addresses from plain text transcripts of emails.
I've cobbled together a bit of code to find the addresses themselves, but I don't know how to make it discriminate between them; right now it just spits out all email addresses in the file. I'd like to make it so it only spits out addresse... | 9 | 2009-02-14T23:49:22Z | 550,018 | <p>if you can be reasonably sure that lines containing these email addresses start with whitespace followed by "From:" you can simply do this:</p>
<pre><code>addresslines = []
for line in open("text.txt"):
if line.strip().startswith("From:"):
addresslines.append(line)
</code></pre>
<p>then later - or on a... | 0 | 2009-02-14T23:59:11Z | [
"python",
"string",
"email",
"parsing",
"text"
] |
Parsing "From" addresses from email text | 550,009 | <p>I'm trying to extract email addresses from plain text transcripts of emails.
I've cobbled together a bit of code to find the addresses themselves, but I don't know how to make it discriminate between them; right now it just spits out all email addresses in the file. I'd like to make it so it only spits out addresse... | 9 | 2009-02-14T23:49:22Z | 550,033 | <p>"[stuff]@[stuff][stuff1-4 letters]" is about right, but if you wanted to you could decode the regular expression using a trick I just found out about, <a href="http://stackoverflow.com/questions/101268/hidden-features-of-python">here</a>. Do the compile() in an interactive Python session like this:</p>
<pre><code>m... | 0 | 2009-02-15T00:13:05Z | [
"python",
"string",
"email",
"parsing",
"text"
] |
Parsing "From" addresses from email text | 550,009 | <p>I'm trying to extract email addresses from plain text transcripts of emails.
I've cobbled together a bit of code to find the addresses themselves, but I don't know how to make it discriminate between them; right now it just spits out all email addresses in the file. I'd like to make it so it only spits out addresse... | 9 | 2009-02-14T23:49:22Z | 550,036 | <p>Try this out:</p>
<pre><code>>>> from email.utils import parseaddr
>>> parseaddr('From: vg@m.com')
('', 'vg@m.com')
>>> parseaddr('From: Van Gale <vg@m.com>')
('Van Gale', 'vg@m.com')
>>> parseaddr(' From: Van Gale <vg@m.com> ')
('Van Gale', 'vg@m.com')
>&... | 31 | 2009-02-15T00:15:07Z | [
"python",
"string",
"email",
"parsing",
"text"
] |
Parsing "From" addresses from email text | 550,009 | <p>I'm trying to extract email addresses from plain text transcripts of emails.
I've cobbled together a bit of code to find the addresses themselves, but I don't know how to make it discriminate between them; right now it just spits out all email addresses in the file. I'd like to make it so it only spits out addresse... | 9 | 2009-02-14T23:49:22Z | 550,044 | <p>I'd do it by expanding the regular expression you're using to include the extra text you want to match. So first, let me explain what that regex does:</p>
<pre><code>[\w\-][\w\-\.]+@[\w\-][\w\-\.]+[a-zA-Z]{1,4}
</code></pre>
<ul>
<li><code>[\w\-]</code> matches any "word" character (letter, number, or underscore),... | 1 | 2009-02-15T00:20:01Z | [
"python",
"string",
"email",
"parsing",
"text"
] |
Parsing "From" addresses from email text | 550,009 | <p>I'm trying to extract email addresses from plain text transcripts of emails.
I've cobbled together a bit of code to find the addresses themselves, but I don't know how to make it discriminate between them; right now it just spits out all email addresses in the file. I'd like to make it so it only spits out addresse... | 9 | 2009-02-14T23:49:22Z | 550,068 | <pre><code>mailsrch = re.compile(r'[\w\-][\w\-\.]+@[\w\-][\w\-\.]+[a-zA-Z]{1,4}')
</code></pre>
<p>Expression breakdown:</p>
<p><code>[\w-]</code>: any word character (alphanumeric, plus underscore) or a dash</p>
<p><code>[\w-.]+</code>: any word character, a dash, or a period/dot, one or more times</p>
<p><code>@<... | 2 | 2009-02-15T00:37:27Z | [
"python",
"string",
"email",
"parsing",
"text"
] |
Parsing "From" addresses from email text | 550,009 | <p>I'm trying to extract email addresses from plain text transcripts of emails.
I've cobbled together a bit of code to find the addresses themselves, but I don't know how to make it discriminate between them; right now it just spits out all email addresses in the file. I'd like to make it so it only spits out addresse... | 9 | 2009-02-14T23:49:22Z | 550,089 | <p>Use the email and mailbox packages to parse the plain text version of the email. This will convert it to an object that will enable to extract all the addresses in the 'From' field.</p>
<p>You can also do a lot of other analysis on the message, if you need to process other header fields, or the message body.</p>
<... | 2 | 2009-02-15T00:52:29Z | [
"python",
"string",
"email",
"parsing",
"text"
] |
Parsing "From" addresses from email text | 550,009 | <p>I'm trying to extract email addresses from plain text transcripts of emails.
I've cobbled together a bit of code to find the addresses themselves, but I don't know how to make it discriminate between them; right now it just spits out all email addresses in the file. I'd like to make it so it only spits out addresse... | 9 | 2009-02-14T23:49:22Z | 550,105 | <pre><code>import email
msg = email.message_from_string(str)
# or
# f = open(file)
# msg = email.message_from_file(f)
msg['from']
# and optionally
from email.utils import parseaddr
addr = parseaddr(msg['from'])
</code></pre>
| 8 | 2009-02-15T01:14:59Z | [
"python",
"string",
"email",
"parsing",
"text"
] |
Parsing "From" addresses from email text | 550,009 | <p>I'm trying to extract email addresses from plain text transcripts of emails.
I've cobbled together a bit of code to find the addresses themselves, but I don't know how to make it discriminate between them; right now it just spits out all email addresses in the file. I'd like to make it so it only spits out addresse... | 9 | 2009-02-14T23:49:22Z | 550,132 | <p>Roughly speaking, you can:</p>
<pre><code>from email.utils import parseaddr
foundemail = []
for line in open("text.txt"):
if not line.startswith("From:"): continue
n, e = parseaddr(line)
foundemail.append(e)
print foundemail
</code></pre>
<p>This utilizes the built-in python parseaddr function to pars... | 1 | 2009-02-15T01:39:29Z | [
"python",
"string",
"email",
"parsing",
"text"
] |
What causes Python socket error? | 550,032 | <pre><code> File "C:\Python25\lib\SocketServer.py", line 330, in __init__
self.server_bind()
File "C:\Python25\lib\BaseHTTPServer.py", line 101, in server_bind
SocketServer.TCPServer.server_bind(self)
File "C:\Python25\lib\SocketServer.py", line 341, in server_bind
self.socket.bind(self.server_address)... | 10 | 2009-02-15T00:12:53Z | 550,034 | <p>It might be possible that you are trying to run on a port the current user account does not have permission to bind to. This could be port 80 or something. Try increasing the portnumber or use a user with sufficient privileges.</p>
<p>Hope this helps</p>
| 20 | 2009-02-15T00:14:39Z | [
"python",
"sockets",
"permissions"
] |
What causes Python socket error? | 550,032 | <pre><code> File "C:\Python25\lib\SocketServer.py", line 330, in __init__
self.server_bind()
File "C:\Python25\lib\BaseHTTPServer.py", line 101, in server_bind
SocketServer.TCPServer.server_bind(self)
File "C:\Python25\lib\SocketServer.py", line 341, in server_bind
self.socket.bind(self.server_address)... | 10 | 2009-02-15T00:12:53Z | 1,082,830 | <blockquote>
<p>I wonder why the error is not "Port
already in use". I kind of know the
answer but I should not need to use SO
to know it. :) â Oscar Reyes May 13 at
19:09</p>
</blockquote>
<p>The port is not in use, (in UNIX) you need to be superuser to listen on any port < 1024.</p>
| 3 | 2009-07-04T19:24:57Z | [
"python",
"sockets",
"permissions"
] |
What causes Python socket error? | 550,032 | <pre><code> File "C:\Python25\lib\SocketServer.py", line 330, in __init__
self.server_bind()
File "C:\Python25\lib\BaseHTTPServer.py", line 101, in server_bind
SocketServer.TCPServer.server_bind(self)
File "C:\Python25\lib\SocketServer.py", line 341, in server_bind
self.socket.bind(self.server_address)... | 10 | 2009-02-15T00:12:53Z | 4,505,094 | <p>I am assuming your are using the default port assigned by gae sdk so you might want to ensure that it is not used by any other programs.</p>
| 0 | 2010-12-22T00:01:43Z | [
"python",
"sockets",
"permissions"
] |
What causes Python socket error? | 550,032 | <pre><code> File "C:\Python25\lib\SocketServer.py", line 330, in __init__
self.server_bind()
File "C:\Python25\lib\BaseHTTPServer.py", line 101, in server_bind
SocketServer.TCPServer.server_bind(self)
File "C:\Python25\lib\SocketServer.py", line 341, in server_bind
self.socket.bind(self.server_address)... | 10 | 2009-02-15T00:12:53Z | 39,647,858 | <p>run it as follow. This should work</p>
<pre><code>python -m 8888
</code></pre>
<p>if this does not work. Try other numbers like 8080.</p>
| 0 | 2016-09-22T19:57:26Z | [
"python",
"sockets",
"permissions"
] |
Removing the TK icon on a Tkinter window | 550,050 | <p>Does anybody know how to make the icon not show up? I'm looking for a way to have no icon at all.</p>
| 16 | 2009-02-15T00:27:10Z | 550,071 | <p>As far as I know, the closest you will get to a "blank" icon is using one that's the same color as the window title bar. But then again a lot of users use different color themes, so it won't go over very well.</p>
<p>However if you use py2exe you can use something like <a href="http://angusj.com/resourcehacker/" re... | 1 | 2009-02-15T00:38:56Z | [
"python",
"python-3.x",
"tkinter",
"tk"
] |
Removing the TK icon on a Tkinter window | 550,050 | <p>Does anybody know how to make the icon not show up? I'm looking for a way to have no icon at all.</p>
| 16 | 2009-02-15T00:27:10Z | 754,736 | <h3>On Windows</h3>
<p><strong>Step One:</strong></p>
<p>Create a transparent icon using either an icon editor, or a site like <a href="http://www.rw-designer.com/online_icon_maker.php" rel="nofollow">rw-designer</a>. Save it as <code>transparent.ico</code>.</p>
<p><strong>Step Two:</strong></p>
<pre><code>from tki... | 30 | 2009-04-16T04:11:48Z | [
"python",
"python-3.x",
"tkinter",
"tk"
] |
Removing the TK icon on a Tkinter window | 550,050 | <p>Does anybody know how to make the icon not show up? I'm looking for a way to have no icon at all.</p>
| 16 | 2009-02-15T00:27:10Z | 18,277,350 | <p>Similar to the accepted answer (with the con of being uglier):</p>
<pre><code>import tkinter
import tempfile
ICON = (b'\x00\x00\x01\x00\x01\x00\x10\x10\x00\x00\x01\x00\x08\x00h\x05\x00\x00'
b'\x16\x00\x00\x00(\x00\x00\x00\x10\x00\x00\x00 \x00\x00\x00\x01\x00'
b'\x08\x00\x00\x00\x00\x00@\x05\x00\x00... | 5 | 2013-08-16T15:48:34Z | [
"python",
"python-3.x",
"tkinter",
"tk"
] |
Removing the TK icon on a Tkinter window | 550,050 | <p>Does anybody know how to make the icon not show up? I'm looking for a way to have no icon at all.</p>
| 16 | 2009-02-15T00:27:10Z | 37,566,507 | <p>Based on previous responses i used this solution:</p>
<pre><code>from PIL import ImageTk
import zlib,base64
import Tkinter
icon=zlib.decompress(base64.b64decode('eJxjYGAEQgEBBiDJwZDBy'
'sAgxsDAoAHEQCEGBQaIOAg4sDIgACMUj4JRMApGwQgF/ykEAFXxQRc='))
root=Tkinter.Tk()
image=ImageTk.PhotoImage(data=icon)
root.tk.call('wm... | 0 | 2016-06-01T10:47:50Z | [
"python",
"python-3.x",
"tkinter",
"tk"
] |
Does python have something like C++'s using keyword? | 550,148 | <p>In C++ you can often drastically improve the readability of your code by careful usage of the "using" keyword, for example: </p>
<pre><code>void foo()
{
std::vector< std::map <int, std::string> > crazyVector;
std::cout << crazyVector[0].begin()->first;
}
</code></pre>
<p>becomes</p>
<... | 6 | 2009-02-15T01:50:34Z | 550,156 | <pre><code>import X
</code></pre>
<p>or</p>
<pre><code>from X import *
</code></pre>
<p>or </p>
<pre><code>from X import a, b, c
</code></pre>
<p>Where X is the Python module you want to use.</p>
<p>It would be helpful for you to give us a Python code sample that you think needs cleaned up.</p>
| 6 | 2009-02-15T01:54:18Z | [
"python",
"namespaces",
"using"
] |
Does python have something like C++'s using keyword? | 550,148 | <p>In C++ you can often drastically improve the readability of your code by careful usage of the "using" keyword, for example: </p>
<pre><code>void foo()
{
std::vector< std::map <int, std::string> > crazyVector;
std::cout << crazyVector[0].begin()->first;
}
</code></pre>
<p>becomes</p>
<... | 6 | 2009-02-15T01:50:34Z | 550,160 | <p>Sure, python's dynamism makes this trivial. If you had a class buried deep in a namespace: foo.bar.baz.blah, you can do:</p>
<pre><code>def foo:
f = foo.bar.baz.blah
f1 = f()
</code></pre>
| 5 | 2009-02-15T01:56:14Z | [
"python",
"namespaces",
"using"
] |
Does python have something like C++'s using keyword? | 550,148 | <p>In C++ you can often drastically improve the readability of your code by careful usage of the "using" keyword, for example: </p>
<pre><code>void foo()
{
std::vector< std::map <int, std::string> > crazyVector;
std::cout << crazyVector[0].begin()->first;
}
</code></pre>
<p>becomes</p>
<... | 6 | 2009-02-15T01:50:34Z | 550,161 | <p>As Bill said, Python does have the construction</p>
<pre><code>from X import *
</code></pre>
<p>but you can also explicitly specify which names you want imported from the module (namespace):</p>
<pre><code>from X import foo, bar, blah
</code></pre>
<p>This tends to make the code even more readable/easier to unde... | 17 | 2009-02-15T01:58:04Z | [
"python",
"namespaces",
"using"
] |
Does python have something like C++'s using keyword? | 550,148 | <p>In C++ you can often drastically improve the readability of your code by careful usage of the "using" keyword, for example: </p>
<pre><code>void foo()
{
std::vector< std::map <int, std::string> > crazyVector;
std::cout << crazyVector[0].begin()->first;
}
</code></pre>
<p>becomes</p>
<... | 6 | 2009-02-15T01:50:34Z | 550,367 | <p>Note that </p>
<pre><code>from foo import bar
</code></pre>
<p>works even if <code>bar</code> is a module in the <code>foo</code> package. This lets you limit your namespace pollution without having to name each function/class in <code>foo.bar</code> that you might care to use. It also aids readers of your code, b... | 0 | 2009-02-15T05:23:17Z | [
"python",
"namespaces",
"using"
] |
Does python have something like C++'s using keyword? | 550,148 | <p>In C++ you can often drastically improve the readability of your code by careful usage of the "using" keyword, for example: </p>
<pre><code>void foo()
{
std::vector< std::map <int, std::string> > crazyVector;
std::cout << crazyVector[0].begin()->first;
}
</code></pre>
<p>becomes</p>
<... | 6 | 2009-02-15T01:50:34Z | 8,754,770 | <p>In addition to David's answer:</p>
<ol>
<li>One should use round brackets in <code>from X import (foo, bar, blah)</code> for a sake of <a href="http://www.python.org/dev/peps/pep-0008/" rel="nofollow">PEP8</a>. </li>
<li>Full syntax allows renaming (rebinding) package names to their new identifiers within the scope... | 1 | 2012-01-06T07:35:28Z | [
"python",
"namespaces",
"using"
] |
Django Model API reverse lookup of many to many relationship through intermediary table | 550,300 | <p>I have a Resident and can not seem to get the set of SSA's the resident belongs to. I've tried <code>res.ssa_set.all()</code> <code>.ssas_set.all()</code> and <code>.ssa_resident_set.all()</code>. Can't seem to manage it. What's the syntax for a reverse m2m lookup through another table? </p>
<p>EDIT: I'm getting an... | 4 | 2009-02-15T04:03:13Z | 550,308 | <p>I was trying to evaluate a query set object, not the object itself. Executing a get on the query set and then a lookup of the relation set worked fine. I'm changing to community wiki and leaving this here just incase someone else is as stupid as I was.</p>
<p>A working example:</p>
<pre><code>resident = Resident.o... | 1 | 2009-02-15T04:07:41Z | [
"python",
"django",
"django-models",
"many-to-many"
] |
How can I provide safety template for user to modify with python? | 550,337 | <p>I am building a multi-user web application. Each user can have their own site under my application. I am considering how to allow user to modify template without security problem? I have evaluated some python template engine. For example, genshi, it is a pretty wonderful template engine, but however it might be dang... | 0 | 2009-02-15T04:44:31Z | 550,344 | <p>The short answer is probably "you can't".</p>
<p>The best you can probably do is to trap the individual users in virtual machines or sandboxes.</p>
| -1 | 2009-02-15T04:49:51Z | [
"python",
"website",
"templates"
] |
How can I provide safety template for user to modify with python? | 550,337 | <p>I am building a multi-user web application. Each user can have their own site under my application. I am considering how to allow user to modify template without security problem? I have evaluated some python template engine. For example, genshi, it is a pretty wonderful template engine, but however it might be dang... | 0 | 2009-02-15T04:44:31Z | 550,364 | <p>Look at <a href="http://docs.djangoproject.com/en/dev/topics/templates/#topics-templates" rel="nofollow">Django templte engine</a>. It does not support execution of arbitrary python code and all accessible variables must be passed into template explicity. This should be pretty good foundation for building user-cus... | 1 | 2009-02-15T05:18:01Z | [
"python",
"website",
"templates"
] |
How can I provide safety template for user to modify with python? | 550,337 | <p>I am building a multi-user web application. Each user can have their own site under my application. I am considering how to allow user to modify template without security problem? I have evaluated some python template engine. For example, genshi, it is a pretty wonderful template engine, but however it might be dang... | 0 | 2009-02-15T04:44:31Z | 550,369 | <p>In rails there's something called <a href="http://www.liquidmarkup.org/" rel="nofollow">liquid</a>. You might take a look at that to get some ideas. Another idea: at the very least, one thing you <em>could</em> do is to convert your objects into simple dictionary - something like a json representation, and then pass... | 0 | 2009-02-15T05:25:28Z | [
"python",
"website",
"templates"
] |
How can I provide safety template for user to modify with python? | 550,337 | <p>I am building a multi-user web application. Each user can have their own site under my application. I am considering how to allow user to modify template without security problem? I have evaluated some python template engine. For example, genshi, it is a pretty wonderful template engine, but however it might be dang... | 0 | 2009-02-15T04:44:31Z | 550,438 | <p>Jinja2 is a Django-ish templating system that has a sandboxing feature. I've never attempted to use the sandboxing, but I quite like Jinja2 as an alternative to Django's templates. It still promotes separation of template from business logic, but has more Pythonic calling conventions, namespacing, etc. </p>
<p><a ... | 4 | 2009-02-15T06:56:10Z | [
"python",
"website",
"templates"
] |
py2exe to generate dlls? | 550,446 | <p>Is there a way using py2exe or some other method to generate dll files instead of exe files?</p>
<p>I would want to basically create a normal win32 dll with normal functions but these functions would be coded in python instead of c++.</p>
| 10 | 2009-02-15T07:06:26Z | 550,472 | <p>I am not aware of <code>py2exe</code> being able to do that, as I believe that it does not actually make object symbols out of your Python code, but just embeds the compiled byte-code in an executable with the Python runtime).</p>
<p>Creating a native library may require a bit more work (to define the C/C++ interfa... | 4 | 2009-02-15T07:27:15Z | [
"python",
"windows",
"dll",
"py2exe"
] |
py2exe to generate dlls? | 550,446 | <p>Is there a way using py2exe or some other method to generate dll files instead of exe files?</p>
<p>I would want to basically create a normal win32 dll with normal functions but these functions would be coded in python instead of c++.</p>
| 10 | 2009-02-15T07:06:26Z | 551,368 | <p>I doubt that py2exe does this, as it's architectured around providing a bootstrapping .exe that rolls out the python interpreter and runs it.</p>
<p>But why not just embed Python in C code, and compile that code as a DLL?</p>
| 4 | 2009-02-15T18:36:51Z | [
"python",
"windows",
"dll",
"py2exe"
] |
py2exe to generate dlls? | 550,446 | <p>Is there a way using py2exe or some other method to generate dll files instead of exe files?</p>
<p>I would want to basically create a normal win32 dll with normal functions but these functions would be coded in python instead of c++.</p>
| 10 | 2009-02-15T07:06:26Z | 598,780 | <p>I think you could solve this by doing some hacking:</p>
<ul>
<li>Take a look at the zipextimporter module in py2exe . It helps with importing pyd-files from a zip. </li>
<li>Using that, you might be able to load py2exe's output file in your own app/dll using raw python-api. (Use boost::python if you can and want)</... | 6 | 2009-02-28T22:13:25Z | [
"python",
"windows",
"dll",
"py2exe"
] |
py2exe to generate dlls? | 550,446 | <p>Is there a way using py2exe or some other method to generate dll files instead of exe files?</p>
<p>I would want to basically create a normal win32 dll with normal functions but these functions would be coded in python instead of c++.</p>
| 10 | 2009-02-15T07:06:26Z | 24,002,701 | <p>It looks like it is possible to generate a COM DLL from py2exe:</p>
<p><a href="http://www.py2exe.org/index.cgi/Py2exeAndCtypesComDllServer" rel="nofollow">http://www.py2exe.org/index.cgi/Py2exeAndCtypesComDllServer</a></p>
<pre><code> 23 my_com_server_target = Target(
24 description = "my com server",
... | 0 | 2014-06-02T20:27:03Z | [
"python",
"windows",
"dll",
"py2exe"
] |
py2exe to generate dlls? | 550,446 | <p>Is there a way using py2exe or some other method to generate dll files instead of exe files?</p>
<p>I would want to basically create a normal win32 dll with normal functions but these functions would be coded in python instead of c++.</p>
| 10 | 2009-02-15T07:06:26Z | 26,163,024 | <p>For posterity, I was able to use <a href="https://wiki.python.org/moin/elmer" rel="nofollow">Elmer</a> to successfully generate a usable DLL recently. Their site <a href="http://elmer.sourceforge.net/examples.html" rel="nofollow">has an example of building a DLL wrapper that loads python code</a>. It is pretty cool... | 1 | 2014-10-02T14:25:54Z | [
"python",
"windows",
"dll",
"py2exe"
] |
Quick primer on implementing a COM object that implement some custom IDLs in python? | 550,450 | <p>Does anyone have experience using python to create a COM object that implements some custom IDLs? </p>
<p>Basically I'd like to know if it's extremely simple to do compared to c++, and if it is do you know of a good tutorial?</p>
| 0 | 2009-02-15T07:08:18Z | 550,466 | <p>The tutorial you are looking for is in the <a href="http://oreilly.com/catalog/9781565926219/" rel="nofollow">Python Programming On Win32</a> book, by Mark Hammond and Andy Robinson. A bit old, and the COM object creation info is distributed across some chapters.</p>
<p>A more recent example, <a href="http://techar... | 3 | 2009-02-15T07:25:01Z | [
"python",
"com"
] |
Quick primer on implementing a COM object that implement some custom IDLs in python? | 550,450 | <p>Does anyone have experience using python to create a COM object that implements some custom IDLs? </p>
<p>Basically I'd like to know if it's extremely simple to do compared to c++, and if it is do you know of a good tutorial?</p>
| 0 | 2009-02-15T07:08:18Z | 550,666 | <p>There is also <a href="http://pypi.python.org/pypi/comtypes" rel="nofollow">comtypes</a>, which allows to access and implement custom interfaces. An article on <a href="http://www.codeproject.com/KB/COM/python-comtypes-interop.aspx" rel="nofollow">codeproject</a> has a nice tutorial.</p>
| 2 | 2009-02-15T10:31:59Z | [
"python",
"com"
] |
Quick primer on implementing a COM object that implement some custom IDLs in python? | 550,450 | <p>Does anyone have experience using python to create a COM object that implements some custom IDLs? </p>
<p>Basically I'd like to know if it's extremely simple to do compared to c++, and if it is do you know of a good tutorial?</p>
| 0 | 2009-02-15T07:08:18Z | 831,096 | <p>You should also check <a href="http://oreilly.com/catalog/pythonwin32/chapter/ch12.html" rel="nofollow">Advance COM</a> a free chapter from Python Programming On Win32 mentioned by gimel.</p>
| 1 | 2009-05-06T18:46:01Z | [
"python",
"com"
] |
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