"""
# refactoring

Refactoring is the key to successfull projects.
Refactor:

1) annuity_factor such that:
		conversion to integer is handled,
		no extra printing

2) policy_book into a class such that:
		a function generates the book and the premium
		stats and visualizations functions are avalaible

3) book_report such that: 
		it uses all the previous improvements
"""
[]