problem with class method

[AmirAB]

Hi experts. I am new to Python but understand programming and have a fair idea about it. I need your help for following.

I am trying to execute the following code but getting an error. Both error and code provided below.

class Circle():
    pie=3.14
    def __init__(self,radius=1):
        self.radius=radius
        self.area=pie*radius*radius
        
        
    def Circum(self):
        return(2*self.pie*self.radius)

mycircle=Circle()
mycircle.Circum()     # I get error here when calling this function

Error:
TypeError: Circum() takes 0 positional arguments but 1 was given