类顾名思义,就是一类事物、或者叫做实例,它用来描述具有共同特征的一类事物。我们在python中声明类的关键词是class,类还有功能和属性,属性就是这类事物的特征,而功能就是它能做什么,也是就是方法或者函数。我们仍然用例子来说明问题。
目标:
1.类的定义
3.类的组合使用
4.内置功能
1.类的定义
代码如下:
#!/usr/bin/env python #coding:utf8 class Hotel(object): """docstring for Hotel""" def __init__(self,room,cf=1.0,br=15): self.room = room self.cf = cf self.br = br def cacl_all(self,days=1): return (self.room * self.cf + self.br) * days if __name__ == '__main__': stdroom = Hotel(200) big_room = Hotel(230,0.9) print stdroom.cacl_all() print stdroom.cacl_all(2) print big_room.cacl_all() print big_room.cacl_all(3)
代码如下:
#!/usr/bin/env python # -*- coding: utf-8 -*- # 父类 class AddBook(object): def __init__(self,name,phone): self.name = name self.phone = phone def get_phone(self): return self.phone # 子类,继承 class EmplEmail(AddBook): def __init__(self,nm,ph,email): # AddBook.__init__(self,ph) # 调用父类方法一 super(EmplEmail,self).__init__(nm,ph) # 调用父类方法二 self.email = email def get_email(self): return self.email # 调用 if __name__ == "__main__": Detian = AddBook('handetian','18210413001') Meng = AddBook('shaomeng','18210413002') print Detian.get_phone() print AddBook.get_phone(Meng) alice = EmplEmail('alice','18210418888','alice@xkops.com') print alice.get_email(),alice.get_phone()
3.类的组合使用
代码如下:
#!/usr/bin/env python # -*- coding: utf-8 -*- ''' 1.class类的组合使用 2.手机、邮箱、QQ等是可以变化的(定义在一起),姓名不可变(单独定义)。 3.在另一个类中引用 ''' class Info(object): def __init__(self,phone,email,qq): self.phone = phone self.email = email self.qq = qq def get_phone(self): return self.phone def update_phone(self,newphone): self.phone = newphone print "手机号更改已更改" def get_email(self): return self.email class AddrBook(object): '''docstring for AddBook''' def __init__(self,qq): self.name = name self.info = Info(phone,qq) if __name__ == "__main__": Detian = AddrBook('handetian','18210413001','detian@xkops.com','123456') print Detian.info.get_phone() Detian.info.update_phone(18210413002) print Detian.info.get_phone() print Detian.info.get_email()
代码如下:
#!/usr/bin/env python #coding:utf8 class Books(object): def __init__(self,title,author): self.title = title self.author = author def __str__(self): return self.title def __repr__(self): return self.title def __call__(self): print "%s is written by %s" %(self.title,self.author) if __name__ == '__main__': pybook = Books('Core Python','Wesley') print pybook pybook()
#!/usr/bin/env python #coding:utf8 class Number(object): """Custum object add/radd -> +; sub/rsub -> -; mul/rmul -> *; div/rdiv -> /; """ def __init__(self,number): self.number = number def __add__(self,other): return self.number + other def __radd__(self,other): return self.number + other def __sub__(self,other): return self.number - other def __rsub__(self,other): return other - self.number def __gt__(self,other): if self.number > other: return True return False if __name__ == '__main__': num = Number(10) print num + 20 print 30 + num print num - 5 print 11 - num print num > 20
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持编程小技巧。
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