Python - Working with Files(Name Sorter)

Exercises for Programmers

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)

Exercises for Programmers: 57 Challenges to Develop Your Coding Skills (Brian P. Hogan 著、Pragmatic Bookshelf)のChapter 8(Working with Files)、41(Name Sorter)を取り組んでみる。

41(Name Sorter)

コード(Emacs)

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

filename = 'names.txt'
filename1 = 'output.txt'

names = []
with open(filename) as f:
    for line in f:
        line = line.strip()
        first, last = line.split(',')
        names.append((first.strip(), last.strip()))

names.sort()

with open(filename1, 'w') as f:
    print('Total of {0} names'.format(len(names)), file=f)
    print('--------------------', file=f)
    for first, last in names:
        print('{0}, {1}'.format(first, last), file=f)

入出力結果(Terminal, IPython)

$ cat names.txt 
Ling, Mai
Johnson, Jim
Zarnecki, Sabrina
Jones, Chris
Jones, Aaron
Swift, Geoffrey
Xilong, Fong
$ ./sample41.py
$ cat output.txt 
Total of 7 names
--------------------
Johnson, Jim
Jones, Aaron
Jones, Chris
Ling, Mai
Swift, Geoffrey
Xilong, Fong
Zarnecki, Sabrina
$