python - "Enabling" comparison for classes -

i on csc hw. on classes/objects, , it's simple class on defining circle, name class circle(object).

the exact text of hw (i completed first 2 parts of hw , 3rd part expansion on initial problem):

"""expand on circle class enabling comparison of circle objects using operators such <, >, >=, <=, ==, , !=, 1 circle considered "larger" if in fact larger (i.e., has greater area) other circle.

the following code:

a = circle(2, 5, 1.5) b = circle(-6, 1, 1) print < b, != b, >= b 

should generate output:

false true true 

this code displaying coordinates , radius of circle:

class circle(object):     def __init__(self, x=0, y=0, r=0):         self.x = x         self.y = y         self.r = r     def __str__(self):         return "circle @ (%d , %d). radius: %f" % (self.x, self.y, self.r)  def main():     print circle(3, 5, 4.0)  main() 

the output of class "circle @ (3 , 5). radius: 4:000000"

we pointed page of our textbook math operators classes: eq(), gt(), ge(), lt(), le(), ne(), etc. thinking, did professor want this?

import math class circle(object):     def __init__(self, x=0, y=0, r=0):         self.x = x         self.y = y         self.r = r     def __str__(self):         return "circle @ (%d , %d). radius: %f" % (self.x, self.y, self.r)     def calcarea(self, r):         self.r = r         return (math.pi)*(r**2)     def __gt__(self, circ1radius, circ2radius)         self.circ1radius = circ1radius         self.circ2radius = circ2radius         r1 = circ1radius         r2 = circ2radius         r1 > r2 or r2 > r1     def __ge__(self, circ1radius, circ2radius)     #and on __lt__(), __le__(), __ne__(), etc def main():     = circle(3,4,1.5)      b = circle(1,2,5.0)     c = circle(5,7,7)      d = circle(9,8,3)     print < b, b > c, < c, >= c main() #output should "true, false, true, false" 

do have make definition/attribute each method want use in class? thank in advance.

define or override comparison operators class. http://docs.python.org/reference/expressions.html#notin

looks on right track, except need pass second circle object comparison. self refers first circle object. self.r give r of first circle. need return true or false method.

def __gt__(self, circle2):     return self.r > circle2.r 

note comparing r's of circles.