Python - Storing Collections of Data Using Lists(length(built-in function(len)), doctest module(testmod method))

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 8(Storing Collections of Data Using Lists)、8.9(Exercises) 8.を解いてみる。

8.9(Exercises) 8.

コード(BBEdit)

sample8.py

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

def is_longer(L1, L2):
    """ (list, list) -> bool
    Return True if and only if the length of L1 is longer than the length of L2

    >>> is_longer([1, 2, 3], [4, 5])
    True
    >>> is_longer(['abcdef'], ['ab', 'cd', 'ef'])
    False
    >>> is_longer(['a', 'b', 'c'], [1, 2, 3])
    False
    """
    return len(L1) > len(L2)

if __name__ == '__main__':
    import doctest
    doctest.testmod()

入出力結果(Terminal, IPython)

$ ./sample8.py -v
Trying:
    is_longer([1, 2, 3], [4, 5])
Expecting:
    True
ok
Trying:
    is_longer(['abcdef'], ['ab', 'cd', 'ef'])
Expecting:
    False
ok
Trying:
    is_longer(['a', 'b', 'c'], [1, 2, 3])
Expecting:
    False
ok
1 items had no tests:
    __main__
1 items passed all tests:
   3 tests in __main__.is_longer
3 tests in 2 items.
3 passed and 0 failed.
Test passed.
$