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Issue #29094: Offsets in a ZIP file created with extern file object and modes

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"w" and "x" now are relative to the start of the file.
This commit is contained in:
Serhiy Storchaka 2017-01-01 19:05:29 +02:00
commit e465a9af8e
2 changed files with 6 additions and 2 deletions
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5
Lib/zipfile.py
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@ -1102,11 +1102,12 @@ class ZipFile:
# set the modified flag so central directory gets written
# even if no files are added to the archive
self._didModify = True
self._start_disk = 0
try:
self.start_dir = self._start_disk = self.fp.tell()
self.start_dir = self.fp.tell()
except (AttributeError, OSError):
self.fp = _Tellable(self.fp)
self.start_dir = self._start_disk = 0
self.start_dir = 0
self._seekable = False
else:
# Some file-like objects can provide tell() but not seek()