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d136o/list_creator_shortcut.py

Created October 4, 2016 18:45
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understand shortcuts before using them :)
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list_creator_shortcut.py
$ python
Python 3.5.2 (default, Jun 28 2016, 08:46:01)
[GCC 6.1.1 20160602] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> a = [[0,0],[0,0]]
>>> c = (1,1)
>>> a[c[0]][c[1]] = 100
>>> a
[[0, 0], [0, 100]]
>>> a = [[None]*2]*2
>>> a
[[None, None], [None, None]]
>>> a[c[0]][c[1]] = 100
>>> a
[[None, 100], [None, 100]]
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