[issue42096] zipfile.is_zipfile incorrectly identifying a gzipped file as a zip archive

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

>  functions who's point is to be fast and not consume an amount of memory determined by the input data

I proposed to read the first 4 bytes of the file. It's a fixed length.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42096>
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