Error handling using cmd module

[leifeng]

I'm using Python's cmd module to write my own command line interpreter. I'm not sure how to handle errors using the modules.

Let's say my command eat requires 1 argument.

The function usually goes as follows:

    def do_eat(self, arg):
        args = arg.split()
        if len(args) < 1:
            print("Missing arguments!")
            return

However, I was wondering if one could write it as:

    def do_eat(self, arg):
        args = arg.split()
        if len(args) < 1:
            raise "Missing arguments" # Or raise an enum