[Jython-users] Zipfile usage with mode="a"

[Dan W. <d4...@ho...>]

Hi,

I have found a something strange when using zipfile.ZipFile() with mode="a".

The following code illustrates:

import zipfile

#Open an existing zip file in append mode
file = zipfile.ZipFile("c:\\test.zip", mode="a")

#Add first file
file.write("c:\\test1.txt")

#Add second file
file.write("c:\\test2.txt")

#Close archive
file.close()


At the end of this, only the file test2.txt exists in the zip. It seems that 
each file overwrites the last rather than adding to the archive.

I have tried this in Python 2.2 and found it works correctly.

Also worth noting is that if a zipfile is opened in append mode when it does 
not exist, Jython creates it, whereas Python raises an IOError.

Any insights would be much appreciated.

Dan.




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