How should I conditionally assign based on the existence of a dictionary key?

Question

I've got some Perl code like this:

my $match = $matches{$key}
            ? "$matches{$key} was a match!"
            : "There was no match."

How is this best rewritten in Python? I'm trying to avoid getting a KeyError.

Answer 1

This.

message = "%s was a match"%(matches[key],) if key in matches else "There was no match."