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ZipFile.mkdir(ZipInfo.from_file(...)) CRC AttributeError #119052

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stdlibPython modules in the Lib dirtype-bugAn unexpected behavior, bug, or error
@ucko

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@ucko

Bug report

Bug description:

Adding a directory entry to a zip file on the basis of aZipInfo object (to pick up metadata) fails becauseZipFile evidently expects the object to have aCRC attribute even though it's a directory rather than a file. I can work around this bug by storing theZipInfo in a variable and giving it a nominal CRC (namely 0), but that shouldn't be necessary. Specifically,

importosimportzipfilewithzipfile.ZipFile("bug.zip",mode="w")asz:os.chdir('/')z.mkdir(zipfile.ZipInfo.from_file('usr'))

fails:

  File ".../zipfile-bug.py", line 6, in <module>    z.mkdir(zipfile.ZipInfo.from_file('usr'))  File "/usr/lib/python3.12/zipfile/__init__.py", line 1935, in mkdir    self.fp.write(zinfo.FileHeader(False))                  ^^^^^^^^^^^^^^^^^^^^^^^  File "/usr/lib/python3.12/zipfile/__init__.py", line 460, in FileHeader    CRC = self.CRC          ^^^^^^^^AttributeError: 'ZipInfo' object has no attribute 'CRC'

Could you please take a look?

Thanks!

CPython versions tested on:

3.11, 3.12, 3.13

Operating systems tested on:

Linux

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