I have a zip-file that can be opened/extracted with 7zip but gives an error when I try work with it in python:
Py2 (2.7.3 / Linux/Debian7):
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.7/zipfile.py", line 714, in __init__
    self._GetContents()
  File "/usr/lib/python2.7/zipfile.py", line 748, in _GetContents
    self._RealGetContents()
  File "/usr/lib/python2.7/zipfile.py", line 763, in _RealGetContents
    raise BadZipfile, "File is not a zip file"
zipfile.BadZipfile: File is not a zip file


Py3 (3.4.3 / Windows 7 /64bit):
Traceback (most recent call last):
  File "<pyshell#20>", line 1, in <module>
    badzip = ZipFile(bad)
  File "C:\Python34\lib\zipfile.py", line 937, in __init__
    self._RealGetContents()
  File "C:\Python34\lib\zipfile.py", line 978, in _RealGetContents
    raise BadZipFile("File is not a zip file")
zipfile.BadZipFile: File is not a zip file

The zip-file is attached.