Automate the boring stuff with Python: Comma Code

Question

Currently working my way through this beginners book and have completed one of the practice projects \'Comma Code\' which asks the user to construct a program which:

Answer 1

The format statement is cleaner.

This worked for me as well:

def sentence(x):
    if len(x) == 1:
        return x[0]
    return (', '.join(x[:-1])+ ' and ' + x[-1])