Function _find_unpack_format

Lib/shutil.py:1382–1387

(filename)

                                  "zstd'ed tar-file")

def _find_unpack_format(filename):
    for name, info in _UNPACK_FORMATS.items():
        for extension in info[0]:
            if filename.endswith(extension):
                return name
    return None

def unpack_archive(filename, extract_dir=None, format=None, *, filter=None):
    """Unpack an archive.