5.1__init__
#__init__()可以在类里面初始化 class shemale_cai: def __init__(self): self.gender='女' self.age=1 def print_info(self): print(f'蔡徐坤是一名篮球巨星，性别 {self.gender} 年龄 {self.age}') caixukun=shemale_cai() caixukun.print_info() 5.2__init__带参数
class television(): def __init__(self,width,height): self.width = width self.height = height def print_info(self): print(f'电视机的宽度为{self.width}') print(f'电视机的高度为{self.height}') sony=television(30,20) sony.print_info() 5.3__str__()
class television(): def __init__(self,width,height): self.width = width self.height = height def print_info(self): print(f'电视机的宽度为{self.width}') print(f'电视机的高度为{self.height}') def __str__(self): return("这是索尼电视机的相关属性")#print(sony)时不输出内存，输出解释说明文字 sony=television(30,20) sony.print_info() print(sony) 5.4__del__() 删除
class television(): def __init__(self,width,height): self.width = width self.height = height def print_info(self): print(f'电视机的宽度为{self.width}') print(f'电视机的高度为{self.height}') def __del__(self): print('对象已经删除')#系统自动调用 sony=television(30,20) sony.print_info() 5.5 面向对象之继承
#父类 class A(object): def __init__(self): self.num=1 def info__print(self): print(self.num) #子类 class B(A): pass result=B() result.info__print() 5.6 单继承
class teacher(object): def __init__(self): self.subject='数学成绩' def study_math(self): print(f'好好学习取得好的{self.subject}') class student(teacher): pass xxx=student() print(xxx) xxx.study_math() 5.7 多继承
class math_teacher(object): def __init__(self): self.subject='数学成绩' def study_math(self): print(f'好好学习取得好的{self.subject}') class English_teacher(object): def __init__(self): self.subject='英语成绩' def study_English(self): print(f'好好学习取得好的{self.subject}') class student(English_teacher,math_teacher): pass xxx=student() print(xxx) xxx.study_math() xxx.study_English()#一个类拥有多个父类时，默认使用第一个父类的同名属性和用法 #同样如果子类里面也有和父类相同名字的属性，优先子类 转载请标明出处:python学习――Day5
文章来源: https://blog.csdn.net/weixin_43853077/article/details/96991653