resolvers.py 文件源码

def regex(self):
        """
        Return a compiled regular expression based on the activate language.
        """
        language_code = get_language()
        if language_code not in self._regex_dict:
            regex = self._regex if isinstance(self._regex, six.string_types) else force_text(self._regex)
            try:
                compiled_regex = re.compile(regex, re.UNICODE)
            except re.error as e:
                raise ImproperlyConfigured(
                    '"%s" is not a valid regular expression: %s' %
                    (regex, six.text_type(e))
                )
            self._regex_dict[language_code] = compiled_regex
        return self._regex_dict[language_code]