__init__.py 文件源码

def url(self, value):
        self.__dict__['url'] = value
        if value is not None:
            scheme, netloc, path, params, query, fragment = urlparse.urlparse(value)

            # Exclude default port numbers.
            if scheme == 'http' and netloc[-3:] == ':80':
                netloc = netloc[:-3]
            elif scheme == 'https' and netloc[-4:] == ':443':
                netloc = netloc[:-4]
            if scheme not in ('http', 'https'):
                raise ValueError("Unsupported URL %s (%s)." % (value, scheme))

            # Normalized URL excludes params, query, and fragment.
            self.normalized_url = urlparse.urlunparse((scheme, netloc, path, None, None, None))
        else:
            self.normalized_url = None
            self.__dict__['url'] = None