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MMap File-Backed Arrays for Python

Project Description

© 2014 Farsight Security Inc.

© 2010 Victor Ng

Released under the MIT license. See license.txt.


This library provides persistent, shared, disk-backed arrays with a similar structure to the built-in array module. You might want to use this if you have a dataset that is larger than available physical memory, or if you want to reduce startup time for your program by loading data on demand, or if you want yet another way to share memory between processes.

Compatible with Python 2.7 and Python 3.x. Supports locked pages on Linux >= 2.5.37 with the want_lock parameter to mmaparray.array() and mmaparray.MMap<type>Array.__init__().


import mmapfile

a = mmapfile.array('example.array', 'I', 100)
for i in range(0, len(a)):
    a[i] = i

for i, val in enumerate(a):
    print ('a[{}] = {}'.format(i, val))


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