[Tutor] help with loop that is to be fed out of a word list

[David]

Dear list,

out of "Thinking in Python" I take the following code, which
"takes a word and a string of required letters, and that returns True if
the word uses all the required letters at least once".


def uses_all(word, required):
    for letter in required:
        if letter not in word:
            return False
    return True

Now, I want to feed this code a list of words. This is what I have so far:


def uses_all(required):
    fin = open('words.txt')
    for line in fin:
        word = line.strip()
        for letter in required:
            if letter not in word:
                # print "False!"
                return False
        print word

required = raw_input("what letters have to be used? ")
print required

uses_all(required)


The code runs, but does not print the words. All I get it the output of
the 'print required' command:

david at ubuntu:~/Documents/Tools/Python/Code$ python downey_9.5.py
what letters have to be used? zhg
zhg
aa
z
david at ubuntu:~/Documents/Tools/Python/Code$

I realise that my loop fails to execute beyond the first word in the
list ("aa"), but why?	

Thanks in advance for your insights!

David