expand_dest

Expands the destination by attempting to unpack the return value into an exchange and routing key, falling back to the provided defaults if unpacking fails.

def expand_dest(
    ret: any,
    exchange: string,
    routing_key: string
) - > tuple

Determines the final exchange and routing key by attempting to unpack a return value or falling back to provided defaults.

Parameters

Name	Type	Description
ret	any	The primary source for destination details, expected to be an unpackable sequence of (exchange, routing_key).
exchange	string	The default exchange name to use if the ret parameter cannot be unpacked.
routing_key	string	The default routing key to use if the ret parameter cannot be unpacked.

Returns

Type	Description
tuple	A tuple containing the resolved exchange name and routing key string.