Yuval Greenfield ubershme...@gmail.com added the comment:
This isn't a bug and should be closed. It's more of a stack overflow question.
If you'd like to change this fundamental behavior of a very common operation in
python you should make a proposal to the python ideas mailing list at
Martin v. Löwis mar...@v.loewis.de added the comment:
It's actually fairly easy to explain. Just think about it harder (and consider
Yuval's explanation).
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nosy: +loewis
resolution: - invalid
status: open - closed
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Python tracker
Ezio Melotti ezio.melo...@gmail.com added the comment:
http://docs.python.org/faq/programming.html#how-do-i-create-a-multidimensional-list
http://python.net/crew/mwh/hacks/objectthink.html
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nosy: +ezio.melotti
stage: - committed/rejected
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New submission from Darrell Long darr...@cs.ucsc.edu:
N = 5
board_1 = [[0 for _ in range(N)] for __ in range(N)]
is not the same as:
board_2= [[0]*N]*N
One makes a proper list of lists (the first), the second makes a new kind of
animal were board_2[1][1] = 99 changes a whole column.
Oddly,
Changes by Darrell Long darr...@cs.ucsc.edu:
--
type: - behavior
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Python tracker rep...@bugs.python.org
http://bugs.python.org/issue14719
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