[issue10972] zipfile: add unicode option to the choose filename encoding

[STINNER Victor]

STINNER Victor <victor.stinner at haypocalc.com> added the comment:

Oh, this patch fixes also a bug: ZipFile._RealGetContents() doesn't keep the unicode flag, so open a ZIP file and then write it somewhere else may change the unicode flag if unicode flag was set but the filename is also encodable to UTF-8 (eg. ASCII filename).

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue10972>
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