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How to know if an object has an attribute in Python
...me as using try/except AttributeError: the docstring of hasattr (in Python 2.7) says that it uses getattr hand catches exceptions.
– Jeff Tratner
Apr 27 '12 at 3:04
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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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What does collation mean?
... @Piskvor: aren't coordinates in your info pointing to a certain country using an alphabet with 42 letters, 15 of them having diacritics?
– Quassnoi
Dec 27 '10 at 13:07
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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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When should I use genetic algorithms as opposed to neural networks? [closed]
...e useful for recognizing patterns. They follow a simplistic model of the brain, and by changing a number of weights between them, attempt to predict outputs based on inputs.
They are two fundamentally different entities, but sometimes the problems they are capable of solving overlap.
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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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