code: def _init(self, clnt):
          '''initialize api by YunpianClient'''
          assert clnt, "clnt is None"
          self._clnt = clnt
          self._apikey = clnt.apikey()
          self._version = clnt.conf(YP_VERSION, defval=VERSION_V2)
          self._charset = clnt.conf(HTTP_CHARSET, defval=CHARSET_UTF8)
          self._name = self.__class__.__module__.split('.')[-1f _init(self, clnt):
          '''initialize api by YunpianClient'''
          assert clnt, "clnt is None"
          self._clnt = clnt
          self._apikey = clnt.apikey()
          self._version = clnt.conf(YP_VERSION, defval=VERSION_V2)
          self._charset = clnt.conf(HTTP_CHARSET, defval=CHARSET_UTF8)
          self._name = self.__class__.__module__.split('.')[-1]
docs: initialize api by YunpianClient