Pygame assiging to rect.attributes doesn't change the anything - python-2.7

Question

From the documentation:
"Assigning to size, width or height changes the dimensions of the rectangle".
I have the following circle, assign a new attribute but no changes can be seen in circle. What am i doing wrong?
import pygame
from pygame.locals import *
pygame.init()
TV=pygame.display.set_mode((400,400))
pygame.display.set_caption("Rect")
c=pygame.draw.circle(TV,(0,100,0),(150,150),100,1)
pygame.draw.rect(TV,(100,0,0),c,1)
print c.size
c.size=(100,100)
print c.size
pygame.display.flip()
while True:
for e in pygame.event.get():
if e.type==QUIT:
pygame.quit()

Answer 1

You draw the circle on the screen surface. Every drawing function then returns a Rect, but:
The functions return a rectangle representing the bounding area of changed pixels.
To actually change the circle on the screen, you have to erase it first (draw something above it), then draw a new circle in the size you want.
Here's a simple example:
import pygame
from pygame.locals import *
pygame.init()
pygame.display.set_caption("Rect")
TV = pygame.display.set_mode((400,400))
c = pygame.draw.circle(TV, (0, 100, 0), TV.get_rect().center, 100, 1)
clock = pygame.time.Clock()
pygame.time.set_timer(USEREVENT, 250)
value = 10
run = True
while run:
for e in pygame.event.get():
if e.type == QUIT:
run = False
if e.type == USEREVENT:
c.inflate_ip(value, value)
if c.width > 260 or c.width < 200:
value *= -1
TV.fill(pygame.color.Color('Black'))
pygame.draw.circle(TV, (0, 100, 0), c.center, c.width/2, 1)
pygame.display.flip()
clock.tick(60)
pygame.quit()