Python - Classes and OOP(Inheritance)

Learning Python
(Oreilly & Associates Inc)
Mark Lutz (著)
(邦訳版)

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)

Learning Python (Mark Lutz (著)、Oreilly & Associates Inc)のPART Ⅵ.(Classes and OOP)、CHAPTER 32(Advanced Class Topics)、Test Your Knowledge: Part VI Exercises 1.(Inheritance)を解いてみる。

その他参考書籍

• Pythonチュートリアル 第2版
• Python クックブック 第2版 (原書(最新版))

1.(Inheritance)

コード(BBEdit)

sample.py

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

class Adder:
    def add(self, x, y):
        print('Not implemented')

class ListAdder(Adder):
    def add(self, x, y):
        return x + y

class DictAdder(Adder):
    def add(self, x, y):
        res = {}
        for k, v in x.items():
            res[k] = v
        for k, v in y.items():
            res[k] = v
        return res

class Adder1:
    def __init__(self, data):
        self.data = data
    def add(self, x, y):
        print('Not implemented')
    def __add__(self, other):
        if isinstance(other, self.__class__):
            other = other.data
        return self.add(self.data, other)

class ListAdder1(Adder1):
    def add(self, x, y):
        return x + y

class DictAdder1(Adder1):
    def add(self, x, y):
        res = {}
        for k, v in x.items():
            res[k] = v
        for k, v in y.items():
            res[k] = v
        return res

if __name__ == '__main__':
    a = Adder()
    b = ListAdder()
    c = DictAdder()

    a.add('python', 10)
    print(b.add([1,2], [3,4,5]))
    print(c.add({'a':1, 'b':2}, {'c':3, 'd':4, 'e':5}))

    a = Adder1("python")
    b = Adder1(10)
    c = ListAdder1([1,2])
    d = ListAdder1([3,4,5])
    e = DictAdder1({'a':1, 'b':2})
    f = DictAdder1({'c':3, 'd':4, 'e':5})
    t = a + b
    t = a + 10
    print(c + d)
    print(c + [3,4,5])
    print(e + f)
    print(e + {'c':3, 'd':4, 'e':5})

入出力結果(Terminal)

 ./sample.py
Not implemented
[1, 2, 3, 4, 5]
{'b': 2, 'c': 3, 'd': 4, 'e': 5, 'a': 1}
Not implemented
Not implemented
[1, 2, 3, 4, 5]
[1, 2, 3, 4, 5]
{'b': 2, 'c': 3, 'd': 4, 'e': 5, 'a': 1}
{'b': 2, 'c': 3, 'd': 4, 'e': 5, 'a': 1}
$