create a simple circle and output the area

circle-2.py

"""
Author: Patrick Elward
Date: 04/26/2019

Create a Circle class with a method called area that calculates and returns its area. 
Then create a Circle object, call area on it, and print the result. 

Use Python's pi function in the built-in math module.

import math
class Circle():
    def __init__(self, radius):
        self.radius = radius

    def calculate_area(self):
        return self.radius ** 2 * math.pi

a_circle = Circle(4)
print(a_circle.calculate_area())
 
 """
 
 import math
 
class Circle():
    def __init__(self,radius):
        self.radius=radius
        self.calculate_area= math.pi * self.radius**2

marshmellows=Circle(5)
print(marshmellows.calculate_area)