utils.py 文件源码

def is_invalid_utf8(string):
    """Returns True if string is invalid UTF-8.

    If string is not a an str object, or is decodeable as UTF-8, False is
    returned.

    """
    if isinstance(string, six.binary_type):
        try:
            string.decode('utf-8')
        except UnicodeDecodeError:
            return True
    return False