NNTPContent.py 文件源码

def md5(self):
        """
        Simply return the md5 hash value associated with the content file.

        If the file can't be accessed, then None is returned.
        """
        md5 = hashlib.md5()
        if self.open(mode=NNTPFileMode.BINARY_RO):
            for chunk in \
                    iter(lambda: self.stream.read(128*md5.block_size), b''):
                md5.update(chunk)
            return md5.hexdigest()
        return None