如何在类中的函数之间传递变量，同时将它们定义为对象？

Question

class C():
    def A(self):
        mm=[]
        kk=[]
        x="Y"
        while x=="Y":
            x=input("do you have any stuff?[Y/N]: ")
            if x=="N":
                break
            mm.append(input("enter the name of the thing: "))
            kk.append(input("Enter the value of the thing: "))
     def printing(self):
        print("="*100)
        print("stuff")
        for i in range(0,len(self.mm)):
            print(self.mm[i]," "*20,self.kk[i])
shr = C()
shr.A()
shr.printing()

代码给出了一个属性错误， “C”对象没有属性“mm” 有人知道如何解决这个错误吗

Answer 1

如果需要类字段，则必须将它们放在__init__方法中。 在您的情况下，您应该这样做：

class C:
    def __init__(self):
        self.mm = []
        self.kk = []
    def A(self):
        x="Y"
        while x=="Y":
            x=input("do you have any stuff?[Y/N]: ")
            if x=="N":
                break
            self.mm.append(input("enter the name of the thing: "))
            self.kk.append(input("Enter the value of the thing: "))
     def printing(self):
        print("="*100)
        print("stuff")
        for i in range(0,len(self.mm)):
            print(self.mm[i]," "*20,self.kk[i])
shr = C()
shr.A()
shr.printing()