Serhiy Storchaka <storchaka+cpyt...@gmail.com> added the comment:

There is an obscure behavior change introduced by this PR. Technically a ZIP 
file can contain several entries with the same name. Currently extractall() 
will extract the last of them multiple times.  The result doesn't differ from 
when extract it only once, there is just a waste of time. After merging this PR 
extractall() will extract different entries to the same location. If one of the 
is a directory, and other is a file, extractall() will fail.

I'm not sure it can be considered a valid ZIP file, but currently the zipfile 
module supports it.

On other hand, what is the benefit of using `self.infolist()` instead of 
`self.namelist()`?

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nosy: +serhiy.storchaka

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue32742>
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