Maxim Yanchenko <[email protected]> added the comment:
First of all, it doesn't fail (at least on Linux), I tested it before posting.
And the latest, it's not like I'm just stalking around and reading Python
sources for fun. It's a real and pretty valid case, I hit it while upgrading
our production code to python 2.7.
I'm using NumPy (linear algebra module) that uses Python's core mmap module
under the hood.
In NumPy, it's pretty valid to have arrays of size 0.
I have a file with a fixed-size header that holds size of the array and some
other meta-data. I mmap this file as a NumPy array using the offset equal to
header size. Of course, if there is no data in the array then the file will be
just header, and the offset will be equal to the size of the file - here is
where this bug hits us as I can't load this file with Python 2.7.2 anymore
(while I was able to with Python 2.5).
This patch fixes this and everything works as expected, giving an array with
zero dimensions ('shape' in terms of NumPy):
>>> x.shape
(0,)
>>> x.size
0
Please kindly consider applying the patch.
----------
resolution: invalid ->
status: closed -> open
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Python tracker <[email protected]>
<http://bugs.python.org/issue13148>
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