python-pptx throwing error on loading (2003 converted) 2010 powerpoint document in windows 7 64x ? -

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i'm using python-pptx version 0.5.7 - windows 7 64x. i'm not sure how procedure able find online didn't work. i'm not sure why zip file error since powerpoint document.

as help.

>>> pptx import presentation >>> f = open("randy-diehl-analysis.pptx") >>> prs = presentation(f) traceback (most recent call last):   file "<stdin>", line 1, in <module>   file "c:\python27\lib\site-packages\pptx\api.py", line 26, in __init__     self._package = package.open(pkg_file)   file "c:\python27\lib\site-packages\pptx\package.py", line 44, in open     return super(package, cls).open(pkg_file)   file "c:\python27\lib\site-packages\pptx\opc\package.py", line 122, in open     pkg_reader = packagereader.from_file(pkg_file)   file "c:\python27\lib\site-packages\pptx\opc\pkgreader.py", line 32, in from_file     phys_reader = physpkgreader(pkg_file)   file "c:\python27\lib\site-packages\pptx\opc\phys_pkg.py", line 102, in __init__     self._zipf = zipfile(pkg_file, 'r')   file "c:\python27\lib\zipfile.py", line 712, in __init__     self._getcontents()   file "c:\python27\lib\zipfile.py", line 746, in _getcontents     self._realgetcontents()   file "c:\python27\lib\zipfile.py", line 787, in _realgetcontents     centdir = struct.unpack(structcentraldir, centdir) struct.error: unpack requires string argument of length 46

i needed specify read , write parameters use file.

f = open("randy-diehl-analysis.pptx", "r+b")

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