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Use curly braces to initialize a Set in Python
I'm learning python, and I have a novice question about initializing sets. Through testing, I've discovered that a set can be initialized like so:
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remove None value from a list without removing the 0 value
...-- Yeah. My main problem is that x > y does not imply not x <= y in python because you can do anything in __lt__ and __le__, so why should x not in y imply not x in y (especially since not in has it's own bytecode?)
– mgilson
Apr 19 '13 at 4:07
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Random strings in Python
How do you create a random string in Python?
13 Answers
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What is the id( ) function used for?
I read the Python 2 docs and noticed the id() function:
13 Answers
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How do I log a Python error with debug information?
I am printing Python exception messages to a log file with logging.error :
12 Answers
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Appending the same string to a list of strings in Python
...s in mylist)
These are very powerful, flexible, and concise. Every good python programmer should learn to wield them.
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What is the equivalent of MATLAB's repmat in NumPy
...the same).
Matlab:
>> repmat([1;1],[1,1,1])
ans =
1
1
Python:
In [46]: a = np.array([[1],[1]])
In [47]: np.tile(a, [1,1,1])
Out[47]:
array([[[1],
[1]]])
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Why is pow(a, d, n) so much faster than a**d % n?
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Depending on your Python version, this may only be true under certain conditions. IIRC, in 3.x and 2.7, you can only use the three-argument form with integral types (and non-negative power), and you will always get modular exponentiation with ...
How do you get a directory listing sorted by creation date in python?
...st of all files in a directory, sorted by date [created | modified], using python, on a windows machine?
17 Answers
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Django TemplateDoesNotExist?
My local machine is running Python 2.5 and Nginx on Ubuntu 8.10, with Django builded from latest development trunk.
20 Answ...