


Detailed explanation of the implementation code for creating and using classes in Python
This article mainly introduces the creation and use of Python implementation classes. It analyzes the definition and use of Python classes based on simple calculator function examples. Friends in need can refer to the following
The examples in this article describe How to create and use Python implementation classes. Share it with everyone for your reference, the details are as follows:
#coding=utf8 #为了使除法总是会返回真实的商,不管操作数是整形还是浮点型。 from __future__ import pision ''''' 类是面向对象编程的核心,它扮演相关数据及逻辑的容器角色。 定义类语法: class ClassName(base_class[es]): "optional documentation string" static_member_declarations method_declarations ---------------------------------------------------------------- 使用class关键字定义类。 可以提供一个可选择的父类或者说基类。 如果没有合适的基类,就默认使用object作为基类。 class行之后是可选的文档字符串、静态成员定义、方法定义。 ''' class calculatorClass(object): '''''first class:calculatorClass''' #定义一个静态变量来保存当前版本号 version=1.0 #设置输入参数并给参数赋值 def __init__(self,one=10,two=20): self.first=one self.second=two '''''加法''' def add(self): return self.first+self.second '''''减法,取正数''' def sub(self): if self.first > self.second : return (self.first-self.second) else: return (self.second-self.first) '''''乘法''' def mul(self): return self.first * self.second '''''除法''' def p(self): if self.second !=0: return self.first/self.second else: pass '''''取模''' def mod(self): if self.second !=0: return self.first%self.second else: pass ''''' 上面类创建一个静态变量version,用例保存版本信息。 __init__()是一个特殊方法当一个类实例被创建时,该方法会自动执行。 该方法可以被当做构建函数,但它并不创建实例。 它仅仅是对象创建后执行的第一个方法。 它的目的是执行一些该对象的必要的初始化工作。 ''' '''''创建一个计算机实例''' cal=calculatorClass(5,2) '''''通过创建的实例,调用类中的方法和属性''' print "The current version:",cal.version print "----------------------------------" print "The two number add:",cal.add() print "The two number sub:",cal.sub() print "The two number mul:",cal.mul() print "The two number p:",cal.p() print "The two number mod:",cal.mod()
The running results are as follows:
The above is the detailed content of Detailed explanation of the implementation code for creating and using classes in Python. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

Many website developers face the problem of integrating Node.js or Python services under the LAMP architecture: the existing LAMP (Linux Apache MySQL PHP) architecture website needs...

When using Scapy crawler, the reason why pipeline persistent storage files cannot be written? Discussion When learning to use Scapy crawler for data crawler, you often encounter a...

Choice of Python Cross-platform desktop application development library Many Python developers want to develop desktop applications that can run on both Windows and Linux systems...

Python process pool handles concurrent TCP requests that cause client to get stuck. When using Python for network programming, it is crucial to efficiently handle concurrent TCP requests. ...

Deeply explore the viewing method of Python functools.partial object in functools.partial using Python...

Getting started with Python: Hourglass Graphic Drawing and Input Verification This article will solve the variable definition problem encountered by a Python novice in the hourglass Graphic Drawing Program. Code...

How to handle high resolution images in Python to find white areas? Processing a high-resolution picture of 9000x7000 pixels, how to accurately find two of the picture...

Data Conversion and Statistics: Efficient Processing of Large Data Sets This article will introduce in detail how to convert a data list containing product information to another containing...
