fields = re.findall('{([^}]*)}', uri_template) for field in fields: is_identifier = re.match('[A-Za-z_][A-Za-z0-9_]+$', field) if not is_identifier or field in keyword.kwlist: cookies.load(value) if sys.version_info < (2, 7): match = re.match('([^=]+)=', value) assert match cookie_name = match.group(1)