Wrong check of payload.value in invoke_method function

[oleg-budylin]

Get the data from UPayload

if not payload.value:
    msg = "The data in UPayload should be Data::Value"
    logging.debug(f"{msg}")
    raise UStatus(code=UCode.INVALID_ARGUMENT, message=msg)

payload.value may be empty, so it is better to check with

if payload.value is None:

[neelam-kushwah]

If payload.value is None, the condition not payload.value will also return True.

[oleg-budylin]

If payload.value is None, the condition not payload.value will also return True.

exactly, but (not payload.value) is True for payload.value = {} or [] or ""