New submission from Robert Rohde <ro...@robertrohde.com>:

I attempted to use GZipFile to process a 1.93 GB file that expands to 18.8 GB.

This consistently produces the same corrupted output file that has 
approximately, but not exactly, the right output file size.

I bypassed GZipFile by calling the 7-Zip executable to open the compressed 
file.  This works correctly and consistently.

I haven't tried to figure out how GZipFile works, but I assume that this 
failure is probably related to the very large size of the files I am working 
with.  I've used GZipFile before on much smaller files with no apparent 
problems.  I have no idea what precisely goes wrong, or how to fix it, but I 
felt it was important to note that GZipFile isn't working for at least some 
very large files.

----------
components: Library (Lib)
messages: 118091
nosy: Robert.Rohde
priority: normal
severity: normal
status: open
title: GZipFile failure on large files
type: behavior
versions: Python 2.7

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue10040>
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