如何在类的方法内部、类外部访问变量、列表或字典？

Question

class test:

    def __init__(self):

        print('inside the code')

    def add(self,x,y):

        a=x+y

    def list_test(self):

        ar=[]
        ar.append(1)
        ar.append(2)


    def dict_test(self):
        dict_t={1:2,2:3}

cl=test()

How do access a , ar and dict_t outside the class? I want to print a and ar here. Thank You.

Answer 1

Like this:

class test:
    def __init__(self):
        self.ar = []
        self.dict_t = {}
        self.a = 0
        print('inside the code')

    def add(self, x, y):
        self.a = x+y

    def list_test(self):
        self.ar.append(1)
        self.ar.append(2)

    def dict_test(self):
        self.dict_t = {1: 2, 2: 3}


t = test()
t.list_test()
print(t.ar)
t.add()
print(t.a)

Note:

Define your variables in the initiate function. Then you can access them through:

class_name.var_name