Question

So, Problem Set 6,

Some of the time my is_valid_word returns the correct answer, sometimes it doesn't, so when letting the computer play it screws up.

http://codepad.org/54HvbrzZ

Any ideas?

Answer 1

can't really see it but should it be:
and word_dict[letter] <= hand[letter]:

try this and see if there is a difference:
http://dpaste.com/666124/

Answer 2

Did the trick. Thanks.