_htmlparser.py 文件源码

def prepare_markup(self, markup, user_specified_encoding=None,
                       document_declared_encoding=None):
        """
        :return: A 4-tuple (markup, original encoding, encoding
        declared within markup, whether any characters had to be
        replaced with REPLACEMENT CHARACTER).
        """
        if isinstance(markup, unicode):
            return markup, None, None, False

        try_encodings = [user_specified_encoding, document_declared_encoding]
        dammit = UnicodeDammit(markup, try_encodings, is_html=True)
        return (dammit.markup, dammit.original_encoding,
                dammit.declared_html_encoding,
                dammit.contains_replacement_characters)