[issue9664] Make gzip module not require that underlying file object support seek

[Matt Kraai]

Matt Kraai <kraai at ftbfs.org> added the comment:

I don't know the gzip format well enough, but I was hoping that it would be possible to iterate through the lines of a gzip-compressed stream without having to use any of the functions that would require seeking.

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nosy: +kraai

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<http://bugs.python.org/issue9664>
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