Как разархивировать архив 7z?

Question

[Denis]

У меня есть файл update2022-03.7z

import py7zr 

with py7zr.SevenZipFile('/dbfs/mnt/databricks/Staging/FTP/NEW/update2022-03.7z', 'r') as z:
    z.extractall(path="/dbfs/mnt/databricks/Staging/FTP/2022_new/")

Ошибка:
Bad7zFile: invalid header data

Если развернуть эту ошибку в терминале, то вижу следующее:

Bad7zFile                                 Traceback (most recent call last)
<command-2400507450692075> in <module>
      1 import py7zr
      2 
----> 3 with py7zr.SevenZipFile('/dbfs/mnt/databricks/Staging/FTP/NEW/update2022-03.7z', 'r') as z:
      4     z.extractall(path="/dbfs/mnt/databricks/Staging/FTP/2022_new/")

/local_disk0/.ephemeral_nfs/envs/pythonEnv-1d939ae4-9aff-498d-843f-aecb1fe35d18/lib/python3.8/site-packages/py7zr/py7zr.py in __init__(self, file, mode, filters, dereference, password, header_encryption, blocksize, mp)
    389         except Exception as e:
    390             self._fpclose()
--> 391             raise e
    392         self._dict: Dict[str, IO[Any]] = {}
    393         self.dereference = dereference

/local_disk0/.ephemeral_nfs/envs/pythonEnv-1d939ae4-9aff-498d-843f-aecb1fe35d18/lib/python3.8/site-packages/py7zr/py7zr.py in __init__(self, file, mode, filters, dereference, password, header_encryption, blocksize, mp)
    375         try:
    376             if mode == "r":
--> 377                 self._real_get_contents(password)
    378                 self.fp.seek(self.afterheader)  # seek into start of payload and prepare worker to extract
    379                 self.worker = Worker(self.files, self.afterheader, self.header, self.mp)

/local_disk0/.ephemeral_nfs/envs/pythonEnv-1d939ae4-9aff-498d-843f-aecb1fe35d18/lib/python3.8/site-packages/py7zr/py7zr.py in _real_get_contents(self, password)
    410         if not self._check_7zfile(self.fp):
    411             raise Bad7zFile("not a 7z file")
--> 412         self.sig_header = SignatureHeader.retrieve(self.fp)
    413         self.afterheader: int = self.fp.tell()
    414         self.fp.seek(self.sig_header.nextheaderofs, os.SEEK_CUR)

/local_disk0/.ephemeral_nfs/envs/pythonEnv-1d939ae4-9aff-498d-843f-aecb1fe35d18/lib/python3.8/site-packages/py7zr/archiveinfo.py in retrieve(cls, file)
   1092     def retrieve(cls, file: BinaryIO):
   1093         obj = cls()
-> 1094         obj._read(file)
   1095         return obj
   1096 

/local_disk0/.ephemeral_nfs/envs/pythonEnv-1d939ae4-9aff-498d-843f-aecb1fe35d18/lib/python3.8/site-packages/py7zr/archiveinfo.py in _read(self, file)
   1108         crc = calculate_crc32(data, crc)
   1109         if crc != self.startheadercrc:
-> 1110             raise Bad7zFile("invalid header data")
   1111 
   1112     def calccrc(self, length: int, header_crc: int):

Comments

[Алексей Черемисин]

Вариантов всего три:
1) битый файл архива
2) новый файл, старая библиотека
3) библиотека не рабочая

И снизьте уровень накала до "Простой".

Answer 1

[alexbprofit]

from lib7zip import Archive, formats

with Archive('filename.7z') as archive:
    # extract all items to the directory
    # directory will be created if it doesn't exist
    archive.extract('directory')