Python: Finding a (string) key in a dictionary that contains a substring

Question

In my script I build a dictionary of keys(albums) mapped to artists(values) so that I can do a quick lookup of what artists made what albums. However, I want the user to be able to find all albums which contain a substring. For example a search on "Light" should return

[Light Chasers] = Cloud Cult and also [Night Light] = Au Revoir Simone

What's the best way to do this? Should I even be using a dictionary?

Answer 1

[(k, v) for (k, v) in D.iteritems() if 'Light' in k]