class Circle(object):

# class object attributes
pi = 3.1415

def __init__(self,radius=1):
    self.radius = radius

def area(self):
    return self.radius**2 * Circle.pi

def set_radius(self,new_radius):
    self.radius = new_radius

def get_radius(self):
    return self.radius

pass



In [48]:

    
class Circle(object):
    # class attribute
    pi=3.1415
    
    # instance attributes
    def __init__(self,radius=1,perimeter=1):
        self.radius = radius
        self.perimeter = perimeter
    
    # methods
    def area(self):
        return self.radius**2 * Circle.pi
    
    def setRadius(self,newRadius):
        self.radius = newRadius
        
    def getRadius(self):
        return self.radius
    
    def getPerimeter(self):
        return 2*Circle.pi*self.radius
    
    def setPerimeter(self):
        self.perimeter = self.getPerimeter()
    
    pass

c = Circle(radius=123)



In [55]:

    
c.pi
c.radius
c.area()
c.setRadius(119)
c.radius
c.getRadius()
c.setPerimeter()



In [60]:

    
c.setRadius(5)



In [61]:

    
c.getPerimeter()









    Out[61]:





31.415000000000003



In [ ]: