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Multiprocessing: How to use Pool.map on a function defined in a class?
...thon 2.7.3 Aug 1,2012, 05:14:39. This does not work on giant iterables -> it causes a OSError: [Errno 24] Too many open files due to the number of pipes it opens.
– Eiyrioü von Kauyf
Jan 18 '13 at 19:19
...
Converting from a string to boolean in Python?
...', 'yup', 'certainly', 'uh-huh']
Be cautious when using the following:
>>> bool("foo")
True
>>> bool("")
False
Empty strings evaluate to False, but everything else evaluates to True. So this should not be used for any kind of parsing purposes.
...
Tags for Emacs: Relationship between etags, ebrowse, cscope, GNU Global and exuberant ctags
...ag signifies a language object for which an index entry is available (or, alternatively, the index entry created for that object). The tags generated by ctags are richer in terms of metadata, but Emacs cannot interpret the additional data anyways, so you should consider them more or less the same (t...
Convert base-2 binary number string to int
...n, and pass it the base of the input number, i.e. 2 for a binary number:
>>> int('11111111', 2)
255
Here is documentation for python2, and for python3.
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Removing a list of characters in string
...are strings (not unicodes), the absolutely best method is str.translate:
>>> chars_to_remove = ['.', '!', '?']
>>> subj = 'A.B!C?'
>>> subj.translate(None, ''.join(chars_to_remove))
'ABC'
Otherwise, there are following options to consider:
A. Iterate the subject char b...
F12 no longer works in Visual Studio
... bindings you care about then you can change them by going to the
Tools->Customize->Keyboard menu option.
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Python strftime - date without leading 0?
... @moose I asked a question about this :-) here is the answer -> stackoverflow.com/questions/28894172/…
– Mathias
Mar 10 '15 at 6:54
10
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How to join absolute and relative urls?
...
You should use urlparse.urljoin :
>>> import urlparse
>>> urlparse.urljoin(url1, url2)
'http://127.0.0.1/test1/test4/test6.xml'
With Python 3 (where urlparse is renamed to urllib.parse) you could use it as follow:
>>> import urlli...
Index all *except* one item in python
...
>>> l = range(1,10)
>>> l
[1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> l[:2]
[1, 2]
>>> l[3:]
[4, 5, 6, 7, 8, 9]
>>> l[:2] + l[3:]
[1, 2, 4, 5, 6, 7, 8, 9]
>>>
See also
Explain Pyt...
Determine if 2 lists have the same elements, regardless of order? [duplicate]
..._lists_equal():
return sorted(data) == sorted(data2)
And testing:
>>> min(timeit.repeat(sets_equal))
13.976069927215576
>>> min(timeit.repeat(counters_equal))
73.17287588119507
>>> min(timeit.repeat(sorted_lists_equal))
36.177085876464844
So we see that comparing...