The following code throws an AttributeError when attempting to extract a malformed archive (attached):

import zipfile
import sys

zf = zipfile.ZipFile(sys.argv[1])
for info in zf.infolist():
  zf.extract(info.filename)

Result:
Traceback (most recent call last):
  File "code.py", line 6, in <module>
    zf.extract(info.filename)
  File "/usr/local/lib/python3.8/zipfile.py", line 1607, in extract
    return self._extract_member(member, path, pwd)
  File "/usr/local/lib/python3.8/zipfile.py", line 1679, in _extract_member
    shutil.copyfileobj(source, target)
  File "/usr/local/lib/python3.8/shutil.py", line 198, in copyfileobj
    buf = fsrc_read(length)
  File "/usr/local/lib/python3.8/zipfile.py", line 903, in read
    data = self._read1(n)
  File "/usr/local/lib/python3.8/zipfile.py", line 986, in _read1
    data = self._decompressor.decompress(data)
  File "/usr/local/lib/python3.8/zipfile.py", line 635, in decompress
    self._decomp = lzma.LZMADecompressor(lzma.FORMAT_RAW, filters=[
AttributeError: 'NoneType' object has no attribute 'LZMADecompressor'

Hi, 

Thank you for your report

but do you have the lzma lib on your system, because without that, Python is not compiled with the support of this format.

example, with a debian docker image:

without all the needed libraries you would get this exception:

Python build finished successfully!
The necessary bits to build these optional modules were not found:
_bz2                  _curses               _curses_panel      
_dbm                  _gdbm                 _hashlib           
_lzma                 _sqlite3              _ssl               
_tkinter              _uuid                 readline           
zlib                                                           
To find the necessary bits, look in setup.py in detect_modules() for the module's name.


The following modules found by detect_modules() in setup.py, have been
built by the Makefile instead, as configured by the Setup files:
_abc                  atexit                pwd                
time                                                           


Failed to build these modules:
_ctypes                                                        

Please could you check again your compilation step and retry with an other file.

I'm closing this issue but you are free to re-open it if you have tested with the right dependencies.

Thank you

This is a duplicate of issue 36991 and will be fixed by the same PR.

superseder: zipfile: AttributeError on extract

nosy: + matrixise
messages: + msg343156

resolution: not a bug
stage: resolved