+
+ @classmethod
+ def _validate_key_value_dict(cls, kv):
+ for k, v in kv.items():
+ if not isinstance(k, str):
+ raise SdlTypeError(r"Wrong dict key type: {}={}. Must be: str".format(k, type(k)))
+ if not isinstance(v, bytes):
+ raise SdlTypeError(r"Wrong dict value type: {}={}. Must be: bytes".format(v, type(v)))