this is a comment

import math # imports make code from other modules available

code blocks are initiated by a trailing colon followed by indented lines

class Circle: # define a class def init(self, radius): # constructor with parameter radius self.radius = radius # store the parameter in a class variable

def get_area(self):            # define a function that belongs to the class
    return math.pi*self.radius*self.radius

code that is not in a class is executed immediately

for i in range(1, 10): # bitwise operation - https://wiki.python.org/moin/BitwiseOperators if (i & 1) == 0: continue circle = Circle(i) # create an instance print("A circle with radius {0} has area {1:0.2f}".format( i, circle.get_area() # print writes output to the console ))