Open-source Languages & Tools for z/OS

Hi Folks,

I seem to be getting a ‘BadZipfile’ error when I try to execute the following against any zip file.

import zipfile
if __name__=='__main__':
    zipped_path = './test.zip'
    z = zipfile.ZipFile(zipped_path)

Gives the following -

Traceback (most recent call last):
  File "zip.py", line 5, in <module>
    pdb.run('zipfile.ZipFile(zipped_path)')
  File "/etc/rocket/python-2017-04-12-py27/lib/python2.7/pdb.py", line 1238, in run
    Pdb().run(statement, globals, locals)
  File "/etc/rocket/python-2017-04-12-py27/lib/python2.7/bdb.py", line 400, in run
    exec cmd in globals, locals
  File "<string>", line 1, in <module>
  File "/test_python/zipfile.py", line 766, in __init__
    self._RealGetContents()
  File "/test_python/zipfile.py", line 807, in _RealGetContents
    raise BadZipfile, "File is not a zip file"
zipfile.BadZipfile: File is not a zip file

Here is some info about my environment -

>echo $_BPXK_AUTOCVT
ON

>echo $_CEE_RUNOPTS
FILETAG(AUTOCVT,AUTOTAG) POSIX(ON)

>python --version
Python 2.7.6

The same zip file (test.zip) is read properly with Rocket’s unzip under USS. I looked into why zipfile was throwing the error and it looks like its comparing a string that its reading from ‘test.zip’ that is represented as ASCII with a string hardcoded in zipfile that is represented as EBCDIC. Here is some output from the debugger that illustrates what I mean -

> <string>(1)<module>()
(Pdb) b zipfile:219
Breakpoint 1 at /test_python/zipfile.py:219
(Pdb) c
> /test_python/zipfile.py(219)_EndRecData()
-> if (len(data) == sizeEndCentDir and
(Pdb) data[0]
'&'
(Pdb) data[0].encode('hex')
'50'
(Pdb) stringEndArchive[0]
'P'
(Pdb) stringEndArchive[0].encode('hex')
'd7'

Any recommendations on how I can fix this?

Thanks,
Aaron

Have you tried with the newer port Python 2.7.13 ?

This works with ASCII internally rather than with EBCDIC.

There is a chance that this fixes the problem.

Thanks, that worked!