Issue #29094: Offsets in a ZIP file created with extern file object and modes
"w" and "x" now are relative to the start of the file.
diff --git a/Lib/zipfile.py b/Lib/zipfile.py
index 2476717..048f60a 100644
--- a/Lib/zipfile.py
+++ b/Lib/zipfile.py
@@ -1028,11 +1028,12 @@
# 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()