16个python基础小例子

''' #demo1 class Person1: pass p1=Person1() print(p1) #test9.2 c1=complex(1,2) c1.conjugate() c1.real #demo9.3 class Person2: def __int__(self,name,age): self.name=name self.age=age def sqy_hi(self): print('你好，我叫'，self.name) p1=Person2('张三',25) p1.say_hi() print(p1.age) #demo9.4 class Person3: count=0 name="Person" Person3.count+=1 print(Person3.count) print(Person3.name) p1=Person3() p2=Person3() print((p1.name,p2.name)) Person3.name="雇员" print((p1.name,p2.name)) p1.name="员工" print((p1.name,p2.name)) #demo9.5 class A: __name='class A' def get_name(): print(A.__name) A.get_name() A.__name #demo9.6 class Person11: def __init__(self,name): self.__name=name @property def name(self): return self.__name p=Person11('王五') print(p.name) #demo9.7 class Person12: def __init__(self,name): self.__name=name @property def name(self): return self.__name @name.setter def name(self,value): self.__name=value @name.deleter def name(self): del self.__name p=Person12('姚6') p.name='王依依' print(p.name) #demo9.8 class Person13: def __init__(self,name): self.__name=name def getname(self): return self.__name def setname(self,value): self.__name=value def delname(self): del self.__name name=property(getname,setname,delname,"I'm the 'name' property") p=Person13('爱丽丝');print(p.name) p.name='罗伯特';print(p.name) #demo9.9 class CustAttribute(object): def __init__(self): pass def __getattribute__(self,name): return str.upper(object.__getattribute__(self,name)) def __setattr__(self,name,value): object.__setattr__(self,name,str.strip(value)) o=CustAttribute() o.firstname=' mary ' print(o.firstname) #demo9.10 class Person4: def say_ji(self,name): self.name=name print('您好,我叫',self.name) p4=Person4() p4.say_hi("爱丽丝") #demo9.11 class Temperature: @staticmethod def c2f(t_c): t_c=float(t_c) t_f=(t_c*9/5)+32 return t_f @staticmethod def f2c(t_f): t_f=float(t_f) t_c=(t_f-32)*5/9 return t_c print("1.从摄氏温度到华氏温度") print("2.从华氏温度到摄氏温度") choice =int(input("请选择转换方向:")) if(choice==1): t_c=float(input("请输入摄氏温度: ")) t_f=Temperature.c2f(t_c) print("华氏温度为: {0:2f}".format(t_f)) elif choice==2: t_f=float(input("请输入华氏温度: ")) t_c=Temperature.f2c(t_f) print("摄氏温度为： {0:2f}".format(t_c)) else: print("无此选项，只能选择1或2！") #demo9.14 class Point: def __init__(self,x=0,y=0): self.x=x self.y=y p1=Point() print("p1({0},{1})".format(p1.x,p1.y)) p1=Point(5,5) print("p1({0},{1})".format(p1.x,p1.y)) ''' ''' #test29 import math class MyMath: def zhouchang(self,r): self.r=r return 2*math.pi*r def mianji(self,r): self.r=r return math.pi*r*r def biaomj(self,r): self.r=r return 4*self.mianji(r) def tiji(self,r): self.r=r return self.biaomj(r)*math.pi*r r=int(input("请输入半径: ")) p1=MyMath() print("圆的周长={0:.2f}".format(p1.zhouchang(r))) print("圆的面积={0:.2f}".format(p1.mianji(r))) print("球的表面积={0:.2f}".format(p1.biaomj(r))) print("球的体积={0:.2f}".format(p1.tiji(r))) ''' ''' #test30 class Temperature: def ToFahrenheit(t_c): t_c=float(t_c) t_f=(t_c*9/5)+32 return t_f def ToCelsius(t_f): t_f=float(t_f) t_c=(t_f-32)*5/9 return t_c t_c=float(input("请输入摄氏温度: ")) t_f=Temperature.ToFahrenheit(t_c) print("摄氏温度={0:.1f},华氏温度为: {1:.1f}".format(t_c,t_f)) t_f=float(input("请输入华氏温度: ")) t_c=Temperature.ToCelsius(t_f) print("华氏温度={0:.1f},摄氏温度为： {1:.1f}".format(t_f,t_c)) '''