"""
Worksheet:  substituting strings
"""

story = """
Once upon a time, deep in an ancient jungle,
there lived a %(animal)s.  This %(animal)s
liked to eat %(food)s, but the jungle had
very little %(food)s to offer.  One day, an
explorer found the %(animal)s and discovered
it liked %(food)s.  The explorer took the
%(animal)s back to %(city)s, where it could
eat as much %(food)s as it wanted.  However,
the %(animal)s became homesick, so the
explorer brought it back to the jungle,
leaving a large supply of %(food)s.

The End
"""

thewords = ['animal', 'food', 'city']
userpicks = {}

def tellstory():
    """
    loop through thewords and get user choices in a dictionary
    named userpicks, then substitute userpicks into the story
    """
    for word in thewords:
        userpicks[word] = raw_input("Enter a value for %s: " % word)
    print story % userpicks