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How to declare array of zeros in python (or an array of a certain size) [duplicate]
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Just for completeness: To declare a multidimensional list of zeros in python you have to use a list comprehension like this:
buckets = [[0 for col in range(5)] for row in range(10)]
to avoid reference sharing between the rows.
This looks more clumsy than chester1000's code, but is essential...
How can I open multiple files using “with open” in Python?
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As of Python 2.7 (or 3.1 respectively) you can write
with open('a', 'w') as a, open('b', 'w') as b:
do_something()
In earlier versions of Python, you can sometimes use
contextlib.nested() to nest context managers. This won...
How do I add the contents of an iterable to a set?
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Note that the representation is just e.g. {1, 2, 3} in Python 3 whereas it was set([1, 2, 3]) in Python 2.
– Radon Rosborough
Nov 26 '17 at 0:04
add a comm...
Log all requests from the python-requests module
I am using python Requests . I need to debug some OAuth activity, and for that I would like it to log all requests being performed. I could get this information with ngrep , but unfortunately it is not possible to grep https connections (which are needed for OAuth )
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Does Python optimize tail recursion?
...ecision. The reasons given seem to boil down to "it's hard to do given how python is interpreted and I don't like it anyway so there!"
– Basic
Sep 4 '14 at 18:36
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Using multiple arguments for string formatting in Python (e.g., '%s … %s')
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Mark Cidade's answer is right - you need to supply a tuple.
However from Python 2.6 onwards you can use format instead of %:
'{0} in {1}'.format(unicode(self.author,'utf-8'), unicode(self.publication,'utf-8'))
Usage of % for formatting strings is no longer encouraged.
This method of string...
How do I get time of a Python program's execution?
I have a command line program in Python that takes a while to finish. I want to know the exact time it takes to finish running.
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How to index into a dictionary?
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Dictionaries are unordered in Python versions up to and including Python 3.6. If you do not care about the order of the entries and want to access the keys or values by index anyway, you can use d.keys()[i] and d.values()[i] or d.items()[i]. (Note that ...
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 13: ordinal not in range(128)
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The file is being read as a bunch of strs, but it should be unicodes. Python tries to implicitly convert, but fails. Change:
job_titles = [line.strip() for line in title_file.readlines()]
to explicitly decode the strs to unicode (here assuming UTF-8):
job_titles = [line.decode('utf-8').stri...
Disable individual Python unit tests temporarily
...ual unit tests be temporarily disabled when using the unittest module in Python?
7 Answers
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