Python - Designing and Using Functions(the number of full weeks that have elapsed between the two days)

Practical Programming
An Introduction to Computer Science
Using Python 3
(Pragmatic Programmers)
(Pragmatic Bookshelf)
Paul Gries (著) Jennifer Campbell (著)
Jason Montojo (著) Lynn Beighley (編集)

開発環境

• OS X Mavericks - Apple(OS)
• Emacs (CUI)、BBEdit - Bare Bones Software, Inc. (GUI) (Text Editor)
• Python 3.4 (プログラミング言語)

Practical Programming: An Introduction to Computer Science Using Python 3 (Pragmatic Programmers) (Paul Gries (著)、Jennifer Campbell (著)、Jason Montojo (著)、Lynn Beighley (編集)、Pragmatic Bookshelf)のChapter 3(Designing and Using Functions)、3.11-8.を解いてみる。

3.11-8.

コード(BBEdit)

sample8.py

#!/usr/bin/env python3
#-*- coding: utf-8 -*-

def weeks_elapsed(day1, day2):
    """
    >>> weeks_elapsed(8, 5)
    0
    >>> weeks_elapsed(40, 61)
    3
    """
    return abs(day1 - day2) // 7

if __name__ == '__main__':
    for day1, day2 in [(3, 20), (20, 3), (8, 5), (40, 61)]:
        print(weeks_elapsed(day1, day2))

入出力結果(Terminal, IPython)

$ ./sample8.py 
2
2
0
3
$