Python - Case Study Word Play(required letters)

Think Python

開発環境

• OS X El Capitan - Apple (OS)
• Emacs (Text Editor)
• Python 3.5 (プログラミング言語)

Think Python (Allen B. Downey (著)、 O'Reilly Media)のChapter 9.(Case Study Word Play)のExercises 9-4(No. 1972)を取り組んでみる。

Exercises 9-4(No. 1972)

コード(Emacs)

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

def uses_only(word, letters):
    for ch in word:
        if ch not in letters:
            return False
    return True

def p(f, letters):
    for line in f:
        words = line.split()
        for word in words:
            if uses_only(word, letters):
                print(word)

if __name__ == '__main__':
    with open('words.txt') as f:
        for letters in ['aeiou', 'aeiouy']:
            print('letters: {0}'.format(letters))
            p(f, letters)
            f.seek(0)

入出力結果(Terminal, IPython)

./sample4.py
letters: aeiou
aa
ae
ai
eau
oe
letters: aeiouy
aa
ae
ai
ay
aye
eau
eye
oe
oy
ya
yay
ye
yea
you
$