Method testzip

Lib/zipfile/__init__.py:1626–1640

Read all the files and check the CRC. Return None if all files could be read successfully, or the name of the offending file otherwise.

(self)

                  file=file)

    def testzip(self):
        """Read all the files and check the CRC.

        Return None if all files could be read successfully, or the name
        of the offending file otherwise."""
        chunk_size = 2 ** 20
        for zinfo in self.filelist:
            try:
                # Read by chunks, to avoid an OverflowError or a
                # MemoryError with very large embedded files.
                with self.open(zinfo.filename, "r") as f:
                    while f.read(chunk_size):     # Check CRC-32
                        pass
            except BadZipFile:
                return zinfo.filename

    def getinfo(self, name):
        """Return the instance of ZipInfo given 'name'."""