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[From a post to python-help]

Related to this is that zipfile raises an exception on creating a file 
that's too big. It seems that the limitation should be documented or 
removed.

This is from the message to python-help:

python version 4.2.  the class zipfile in the module zipfile is unable 
to .close() a file bigger than
2^32-1 (or whatever) bytes.

Traceback (most recent call last):
  File "bk.py", line 12, in ?
    zf.close()
  File "C:\Python24\lib\zipfile.py", line 503, in close
    zinfo.header_offset)
OverflowError: long int too large to convert to int