Python - Comprehending data: Work that data(list comprehension, iteration, filtering)

Head First Python
( O'Reilly Media)
Paul Barry (著)

開発環境

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

Head First Python (Paul Barry(著)、 O'Reilly Media )のChapter 5(Comprehending data: Work that data)、EXERCISE(p.161)を解いてみる。

EXERCISE(p.161)

コード(BBEdit)

sample161.py

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

def sanitize(time_string):
    if '-' in time_string:
        spliter = '-'
    elif ':' in time_string:
        spliter = ':'
    else:
        return (time_string)
    (mins, secs) = time_string.split(spliter)
    return (mins + '.' + secs)
    
with open('james.txt') as f:
    james = f.readline().strip().split(',')

james = sorted([sanitize(t) for t in james])
unique_james = []
for time_string in james:
    if not time_string in unique_james:
        unique_james.append(time_string)

print(unique_james[:3])

入出力結果(Terminal)

$ ./sample161.py
['2.01', '2.22', '2.34']
$