8000 DOC: core: contents of newly allocated space in memmap by larsmans · Pull Request #5176 · numpy/numpy · GitHub
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DOC: core: contents of newly allocated space in memmap #5176

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Oct 12, 2014
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DOC: core: contents of newly allocated space in memmap #5176

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DOC: core: contents of newly allocated space in memmap 
Fixes #5157.
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@larsmans
larsmans committed Oct 12, 2014
commit ade76b0035496ad0239b5236688fa51d4a4e592e
5 changes: 5 additions & 0 deletions numpy/core/memmap.py
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Expand Up @@ -111,6 +111,11 @@ class memmap(ndarray):
certain size depending on the platform. This size is always < 2GB
even on 64-bit systems.

When a memmap causes a file to be created or extended beyond its
current size in the filesystem, the contents of the new part are
unspecified. On systems with POSIX filesystem semantics, the extended
part will be filled with zero bytes.

Examples
--------
>>> data = np.arange(12, dtype='float32')
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