[SciPy-dev] Update memmap for Python 2.6 and 3?
Sturla Molden
sturla at molden.no
Mon Mar 9 09:26:57 EDT 2009
In Python 2.5, mmap always memory maps from the beginning of the file.
This is a problem on 32 bit systems when working on large data files. In
Python 2.6, the mmap object takes an offset parameter to solve this. I
suggest we do something like this in memmap.py:
if float(sys.version[:3]) > 2.5:
bytes = bytes - offset
mm = mmap.mmap(fid.fileno(), bytes, access=acc, offset=offset)
self = ndarray.__new__(subtype, shape, dtype=descr, buffer=mm,
offset=0, order=order)
else:
mm = mmap.mmap(fid.fileno(), bytes, access=acc)
self = ndarray.__new__(subtype, shape, dtype=descr, buffer=mm,
offset=offset, order=order)
Reagards,
Sturla Molden
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