Answer Happy

Write a program in Python. The program must not be something
available on the Internet or in a book or be a minor variation of
what is available. The program must satisfy the following five
requirements:
It must define and meaningfully use at least one class.
It must use at least two meaningful functions besides main
function and the class methods.
Its input and output must be through files (some user input, or
output to screen is ok in addition, if needed).
It must meaningfully use at least one list or one
dictionary.
The program must be well documented with module documentation
(three double-quote comments) for functions and classes as well as
comments at appropriate places in the program.