Bugs item #1724366, was opened at 2007-05-23 13:42
Message generated for change (Comment added) made by gagenellina
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Category: Python Library
Group: Python 2.4
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Geoffrey Bache (gjb1002)
Assigned to: Nobody/Anonymous (nobody)
Summary: cPickle module doesn't work with universal line endings
Initial Comment:
On UNIX, I cannot read pickle files created on Windows using the cPickle
module, even if I open the file with universal line endings.
It works fine with the pickle module but is of course slower (and I have to
read lots of them)
I attach a test case that pickles and unpickles an smptlib.SMTP object,
converting the file to DOS format in between. There is nothing special about
SMTP, you can use any object at all in a different module.
On my system (RHEL4 with Python 2.4.3) I get the following output:
portmoller : pickletest.py cPickle
unix2dos: converting file dump to DOS format ...
Traceback (most recent call last):
File "pickletest.py", line 14, in ?
print load(readFile)
ImportError: No module named smtplib
portmoller : pickletest.py pickle
unix2dos: converting file dump to DOS format ...
<smtplib.SMTP instance at 0xb7ea350c>
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Comment By: Gabriel Genellina (gagenellina)
Date: 2007-05-25 06:00
Message:
Logged In: YES
user_id=479790
Originator: NO
Please try again with this modified version. I think you will see that
Python is trying to import "smtplib\r"
On Windows, trying to read a pickle file with MAC line endings gives a
different error:
cPickle.UnpicklingError: pickle data was truncated
It seems that cPickle support for protocol 0 is broken. If you can, try to
use the higher, binary, protocols, they don't have this problem. Even if
you must use protocol 0, opening the file always in binary mode should not
have this problem.
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