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GeezerVison is showing github.com — gh-110383: Added explanation in Doc about array data types range. Based on GNU docs by LombardiDaniel · Pull Request #113708 · python/cpython

gh-110383: Added explanation in Doc about array data types range. Based on GNU docs #113708

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LombardiDaniel wants to merge 5 commits into python:main from LombardiDaniel:main

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gh-110383: Added explanation in Doc about array data types range. Based on GNU docs #113708

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gh-110383: Added explanation about
LombardiDaniel Jan 4, 2024
27aa110
Merge branch 'main' into main
LombardiDaniel Jan 15, 2024
eb1b5b3
fix trailing whitespace lint
LombardiDaniel Jan 20, 2024
5b697cb
Merge branch 'main' into main
LombardiDaniel Jan 20, 2024
bf06b75
Update Doc/library/array.rst
LombardiDaniel Mar 14, 2024
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15 changes: 9 additions & 6 deletions 15 Doc/library/array.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -30,17 +30,17 @@ defined:
+-----------+--------------------+-------------------+-----------------------+-------+
| ``'H'`` | unsigned short | int | 2 | |
+-----------+--------------------+-------------------+-----------------------+-------+
| ``'i'`` | signed int | int | 2 | |
| ``'i'`` | signed int | int | 2 | \(2) |
+-----------+--------------------+-------------------+-----------------------+-------+
| ``'I'`` | unsigned int | int | 2 | |
| ``'I'`` | unsigned int | int | 2 | \(2) |
+-----------+--------------------+-------------------+-----------------------+-------+
| ``'l'`` | signed long | int | 4 | |
| ``'l'`` | signed long | int | 4 | \(2) |
+-----------+--------------------+-------------------+-----------------------+-------+
| ``'L'`` | unsigned long | int | 4 | |
| ``'L'`` | unsigned long | int | 4 | \(2) |
+-----------+--------------------+-------------------+-----------------------+-------+
| ``'q'`` | signed long long | int | 8 | |
| ``'q'`` | signed long long | int | 8 | \(2) |
+-----------+--------------------+-------------------+-----------------------+-------+
| ``'Q'`` | unsigned long long | int | 8 | |
| ``'Q'`` | unsigned long long | int | 8 | \(2) |
+-----------+--------------------+-------------------+-----------------------+-------+
| ``'f'`` | float | float | 4 | |
+-----------+--------------------+-------------------+-----------------------+-------+
Expand All @@ -60,6 +60,9 @@ Notes:
.. deprecated-removed:: 3.3 3.16
Please migrate to ``'w'`` typecode.

(2)
As of 2024, 'h', 'i', 'l', and 'q' are usually 2, 4, 4 on Windows else 8, and 8 bytes.
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@encukou encukou May 30, 2024

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This note talks about h, so if it's kept, the \(2) should be added to the h & H lines in the table.

But, maybe this PR should be closed without merging. If you're wrinting cross-platform code you shouldn't rely on “common” values; if not you can use itemsize to find values that are actually right for your platform.

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The actual representation of values is determined by the machine architecture
(strictly speaking, by the C implementation). The actual size can be accessed
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