[issue34472] zipfile: does not include optional descriptor signature

Change by Silas Sewell : -- keywords: +patch pull_requests: +8348 stage: -> patch review ___ Python tracker <https://bugs.python.org/issue34472> ___ ___ Py

[issue34472] zipfile: does not include optional descriptor signature

New submission from Silas Sewell : When adding a fileobj that is not seekable to a zip using the zipfile module, the optional signature value 0x08074b50 is not included. This breaks certain zip implementations, including the builtin MacOS Archive Utility. See https://pkware.cachefly.net