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def func(*args): 统计方法、函数、Animal类对象的个数。
class Animal:
sum=0
def __init__(self,sex):
self.sex=sex
Animal.sum=Animal.sum+1
def func(*args):
print('类对象的个数为:',Animal.sum)
animal1=Animal('公')
animal2=Animal('母')
animal1.func()
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类的创建:比较圆之间的面积
class Circle:
def __init__(self,radius=0,area=0):
self.__radius=radius
self.area=area
def SetRadius(self,r):
self.__radius=r
def Area(self):
self.area=3.14 *self.__radius*self.__radius
return self.area
def __str__(self):
return '圆的面积为:'+str(self.area)
def __gt__(self, other):
return self.area > other.area
if __name__=="__main__":
circle1=Circle()
circle2=Circle()
circle1.SetRadius(eval(input("第一个圆的半径为:")))
a=circle1.Area()
print("第一个圆的面积为",a)
circle2.SetRadius(eval(input("第二个圆的半径为:")))
b=circle2.Area()
print("第二个圆的面积为:",b)
print('圆2的面积比圆1大:',circle2>circle1)
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实验题目:创建子类
如下现有一个保险政策类InsurancePolicy。
class InsurancePolicy:
def __init__(self, price_of_item):
self.price_of_insured_item = price_of_item
1)创建子类:交通险VehicleInsurance,构造方法中通过super将保额存储到实例变量中,同时用实例变量vehicle_Name存储交通工具的名字。创建一个实例方法get_rate(),返回回报率:保额*0.001
2)创建子类:家庭险HomeInsurance。构造方法中通过super将保额存储到实例变量中,同时用实例变量member_number存储家庭成员的人数。创建一个实例方法get_rate(),返回回报率:保额*0.00005
class InsurancePolicy:
def __init__(self,price_of_item):
self.price_of_insured_item =price_of_item
class VehicleInsurance(InsurancePolicy):
def __init__(self, vehicle_name):
self.price_of_item = super().price_of_insured_item
self.vehicle_name = vehicle_name
def get_rate(self):
return self.price_of_item * 0.001
class HomeInsurance(InsurancePolicy):
def __init__(self, member_number):
self.price_of_item = super().price_of_insured_item
self.member_number = member_number
def get_rate(self):
return self.price_of_item * 0.00005