http.py 文件源码

def raw_key(self, key):
        if self._prefix:
            url = self._prefix / key
        elif self._template and isinstance(key, Mapping):
            url = URL(self._template.format_map(key))
        elif self._template and isinstance(key, Sequence):
            url = URL(self._template.format(*key))
        elif self._template:
            url = URL(self._template.format(key))
        elif isinstance(key, str):
            url = URL(key)
        else:
            url = key
        if self._allow_hosts and url.host not in self._allow_hosts:
            raise KeyError(key)
        return url