Python - Oh Oh: Objects and Classes(string, __str__ method)

Introducing Python
Modern Computing in Simple Packages
(O'Reilly Media)
Bill Lubanovic (著)

開発環境

• OS X Yosemite - Apple (OS)
• Emacs (CUI)、BBEdit - Bare Bones Software, Inc. (GUI) (Text Editor)
• Python 3.4 (プログラミング言語)

Introducing Python: Modern Computing in Simple Packages(Bill Lubanovic (著)、 O'Reilly Media)のChapter 6(Oh Oh: Objects and Classes)、Things to Do 6.7.を解いてみる。

Things to Do 6.7.

コード(BBEdit)

sample7.py

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

class Element:
    def __init__(self, name, symbol, number):
        self.name = name
        self.symbol = symbol
        self.number = number
    def dump(self):
        print(self.name, self.symbol, self.number)

class Element1:
    def __init__(self, name, symbol, number):
        self.name = name
        self.symbol = symbol
        self.number = number
    def __str__(self):
        return '{0} {1} {2}'.format(self.name, self.symbol, self.number)
        

d = dict(name='Hydrogen', symbol='H', number=1)
hydrogen = Element(**d)
print(hydrogen)

hydrogen = Element1(**d)
print(hydrogen)

入出力結果(Terminal, IPython)

$ ./sample7.py
<__main__.Element object at 0x108874668>
Hydrogen H 1
$