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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def cmd_output(self, args):
        '''handle output commands'''
        if len(args) < 1 or args[0] == "list":
            self.cmd_output_list()
        elif args[0] == "add":
            if len(args) != 2:
                print("Usage: output add OUTPUT")
                return
            self.cmd_output_add(args[1:])
        elif args[0] == "remove":
            if len(args) != 2:
                print("Usage: output remove OUTPUT")
                return
            self.cmd_output_remove(args[1:])
        elif args[0] == "sysid":
            if len(args) != 3:
                print("Usage: output sysid SYSID OUTPUT")
                return
            self.cmd_output_sysid(args[1:])
        else:
            print("usage: output <list|add|remove|sysid>")