New submission from Nick Henderson :
In both Python 3.8.3 and 3.9.0b3, using zipfile.Path to write a file in a
context manager results in an attempt to write to the zip file after it is
closed.
In Python 3.9.0b3:
import io
from zipfile import ZipFile, Path
def make_zip():
"""Make zip file and return bytes."""
bytes_io = io.BytesIO()
zip_file = ZipFile(bytes_io, mode="w")
zip_path = Path(zip_file, "file-a")
# use zipp.Path.open
with zip_path.open(mode="wb") as fp:
fp.write(b"contents of file-a")
zip_file.close()
data = bytes_io.getvalue()
bytes_io.close()
return data
zip_data = make_zip()
# Exception ignored in:
# Traceback (most recent call last):
# File "/Users/nick/.pyenv/versions/3.9.0b3/lib/python3.9/zipfile.py", line
1807, in __del__
# self.close()
# File "/Users/nick/.pyenv/versions/3.9.0b3/lib/python3.9/zipfile.py", line
1824, in close
# self.fp.seek(self.start_dir)
# ValueError: I/O operation on closed file.
In Python 3.8.3:
import io
from zipfile import ZipFile, Path
def make_zip():
"""Make zip file and return bytes."""
bytes_io = io.BytesIO()
zip_file = ZipFile(bytes_io, mode="w")
zip_path = Path(zip_file, "file-a")
# use zipp.Path.open
with zip_path.open(mode="w") as fp:
fp.write(b"contents of file-a")
zip_file.close()
data = bytes_io.getvalue()
bytes_io.close()
return data
zip_data = make_zip()
# Exception ignored in:
# Traceback (most recent call last):
# File "/Users/nick/.pyenv/versions/3.8.3/lib/python3.8/zipfile.py", line
1820, in __del__
# self.close()
# File "/Users/nick/.pyenv/versions/3.8.3/lib/python3.8/zipfile.py", line
1837, in close
# self.fp.seek(self.start_dir)
# ValueError: I/O operation on closed file.
In the Python 3.8 example, mode="w" is used in the open method on zip_path.
--
components: Library (Lib)
files: zippath_bug_39.py
messages: 374015
nosy: Nick Henderson
priority: normal
severity: normal
status: open
title: Use of zipfile.Path causes attempt to write after ZipFile is closed
type: behavior
versions: Python 3.8, Python 3.9
Added file: https://bugs.python.org/file49329/zippath_bug_39.py
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