Comments on my first script?

[Phillip B Oldham]

Thanks guys. Those comments are really helpful. The odd semi-colon is
my PHP background. Will probably be a hard habbit to break, that
one! ;) If I do accidentally drop a semi-colon at the end of the line,
will that cause any weird errors?

Also, Chris, can you explain this:
a, b = line.split(': ')[:2]

I understand the first section, but I've not seen [:2] before.