Python - Custom data Objects: Bundling code with data(Inherit from Python's built-in list class)

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 6(Custom data Objects: Bundling code with data)、EXERCISE(p.207)を解いてみる。

EXERCISE(p.207)

コード(BBEdit)

sample207.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

class Athletes(list):
    def __init__(self, name, dob=None, times=[]):
        list.__init__([])
        self.name = name
        self.dob = dob
        self.extend(times)
    def top3(self):
        return sorted(set(sanitize(t) for t in self))[:3]
        
def getCoachData(filename):
    try:
        with open(filename) as f:
            data = f.readline()
        temp =  data.strip().split(',')
        return Athletes(temp.pop(0), temp.pop(0), temp)
    except IOError as ioerr:
        print('File error: {0}'.format(ioerr))
        return None

for filename in ['sarah2.txt', 'james2.txt', 'julie2.txt', 'mikey2.txt']:
    athlete = getCoachData(filename)
    print("{0}'s fastest times are: {1}".format(athlete.name, athlete.top3()))
    athlete.append("1.31")
    print("{0}'s fastest times are: {1}".format(athlete.name, athlete.top3()))
    athlete.extend(['2.22', '1-21', '2:22'])
    print("{0}'s fastest times are: {1}".format(athlete.name, athlete.top3()))

入出力結果(Terminal)

$ ./sample207.py
Sarah Sweeney's fastest times are: ['2.18', '2.21', '2.22']
Sarah Sweeney's fastest times are: ['1.31', '2.18', '2.21']
Sarah Sweeney's fastest times are: ['1.21', '1.31', '2.18']
James Lee's fastest times are: ['2.01', '2.16', '2.22']
James Lee's fastest times are: ['1.31', '2.01', '2.16']
James Lee's fastest times are: ['1.21', '1.31', '2.01']
Julie Jones's fastest times are: ['2.11', '2.23', '2.59']
Julie Jones's fastest times are: ['1.31', '2.11', '2.23']
Julie Jones's fastest times are: ['1.21', '1.31', '2.11']
Mikey McManus's fastest times are: ['2.22', '2.31', '2.38']
Mikey McManus's fastest times are: ['1.31', '2.22', '2.31']
Mikey McManus's fastest times are: ['1.21', '1.31', '2.22']
$