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| -rw-r--r-- | numpy/core/memmap.py | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/numpy/core/memmap.py b/numpy/core/memmap.py index b1c96ee29..4b10f361c 100644 --- a/numpy/core/memmap.py +++ b/numpy/core/memmap.py @@ -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') |