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Created on 2012-02-02 00:40 by drathlian, last changed 2022-04-11 14:57 by admin. This issue is now closed.
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| File name | Uploaded | Description | Edit | |
| twoDimensionalList.py | drathlian, 2012-02-02 00:40 | |||
| Messages (2) | |||
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| msg152450 - (view) | Author: Dave E (drathlian) | Date: 2012-02-02 00:40 | |
I might be missing something, but I am expecting the following code to print out a list of lists with each internal list holding one number[0-4], but instead the internal lists are a copy of the list "count". #!/usr/bin/python count = range(4) twoDimensionList = [[]] * len(count) for i in range(len(count)): twoDimensionList[i].append(count[i]) print twoDimensionList Should print: [[0], [1], [2], [3]] but erroneously prints: [[0, 1, 2, 3], [0, 1, 2, 3], [0, 1, 2, 3], [0, 1, 2, 3]] |
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| msg152451 - (view) | Author: Mark Dickinson (mark.dickinson) *  |
Date: 2012-02-02 00:47 | |
This isn't a bug, but a known gotcha: see. http://docs.python.org/faq/programming.html#how-do-i-create-a-multidimensional-list |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:57:26 | admin | set | github: 58133 |
| 2012-02-02 00:47:08 | mark.dickinson | set | status: open -> closed nosy: + mark.dickinson messages: + msg152451 resolution: not a bug |
| 2012-02-02 00:40:48 | drathlian | create | |