def start_cmd(cmd, descr, data):
    """Retain details about starting a command, returning a command identifier.
    """
    if data and "provenance" in data:
        entity_id = tz.get_in(["provenance", "entity"], data)
def start_cmd ( cmd , descr , data ) : if data and "provenance" in data : entity_id = tz . get_in ( [ "provenance" , "entity" ] , data )
Retain details about starting a command, returning a command identifier.