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Why is pow(a, d, n) so much faster than a**d % n?
... 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 the native int type, but not necessarily with other integral types. But in older ...
Python list subtraction operation
...et subtraction" operation. Use the set data structure for that.
In Python 2.7:
x = {1,2,3,4,5,6,7,8,9,0}
y = {1,3,5,7,9}
print x - y
Output:
>>> print x - y
set([0, 8, 2, 4, 6])
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Deep copy of a dict in python
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Is there any difference in Python 3.2 and 2.7 codes? They seem identical to me. If so, would be better a single block of code and a statement "Works for both Python 3 and 2"
– MestreLion
Jun 7 '14 at 3:59
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Constantly print Subprocess output while process is running
...or not the process has finished. I tried this using subprocess32 on python 2.7
– Har
Dec 26 '15 at 19:05
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How can I open the interactive matplotlib window in IPython notebook?
... Works for me now (2014-08) using current release of Python 2.7 on Win7 x64.
– nerdfever.com
Aug 29 '14 at 1:31
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Pythonic way to find maximum value and its index in a list?
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This was on 2.7
– portforwardpodcast
Dec 7 '17 at 11:11
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Is there any pythonic way to combine two dicts (adding values for keys that appear in both)?
...could also use for k in b.viewkeys() & a.viewkeys(), when using python 2.7, and skip the creation of sets.
– Martijn Pieters♦
Jun 13 '12 at 10:32
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What's the bad magic number error?
...b3: 62101
2.5b3: 62111
2.5c1: 62121
2.5c2: 62131
2.6a0: 62151
2.6a1: 62161
2.7a0: 62171
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What is the fastest way to check if a class has a function defined?
I'm writing an AI state space search algorithm, and I have a generic class which can be used to quickly implement a search algorithm. A subclass would define the necessary operations, and the algorithm does the rest.
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How do I find the location of Python module sources?
... 2.0+ is available online at http://hg.python.org/cpython/file/X.Y/ (e.g., 2.7 or 3.3). So, once you discover that inspect.getfile(datetime) is a .so or .pyd file like /usr/local/lib/python2.7/lib-dynload/datetime.so, you can look it up inside the Modules directory. Strictly speaking, there's no way...