There's an error in your program:
*** can't assign to literal (ball2.py,line 64)

from pygame import *
import random

ballpic = image.load('ball.png')
ballpic.set_colorkey((0,0,0))

fistpic = image.load ('fist.png')
fistpic.set_colorkey ((0,0,0))

c_x = 400
c_y = 400

numfists = 15
delay = 10

done = False

fists = []
fist = []

for count in range(numfists):
	fist.append(dict)
	fists[count] = {'x': 0, 'y': 0, 'e_x': random.randint(1, 2), 'e_y': random.randint(1, 2)}

init()
screen = display.set_mode((640, 480))
key.set_repeat(1, 1)
display.set_caption('Ball game')
event.set_grab(1)

while done == False:
	screen.fill(0)

	for count in range(numfists):
		screen.blit(fistpic, (fists[count]['x'], fists[count]['y']))

	screen.blit(ballpic, (ball['c_x'],ball['c_y']))

	display.update()

	time.delay(delay)
	

	for count in range(numballs):
		balls[count]['x'] = balls[count]['x'] + balls[count]['e_x']
		balls[count]['y'] = balls[count]['y'] + balls[count]['e_y']

	for count in range(numballs):
		if balls[count]['x'] > 620:
			balls[count]['e_x'] = random.randint(-3, 0)
		if balls[count]['x'] < -10:
			balls[count]['e_x'] = random.randint(0, 3)
		if balls[count]['y'] > 470:
			balls[count]['e_y'] = random.randint(-3, 0)
		if balls[count]['y'] < -10:
			balls[count]['e_y'] = random.randint(0, 3)

	for e in event.get():
		if e.type == KEYUP:
			if e.key == K_ESCAPE:
				done = True
				
	if pressed_keys[K_LEFT]:
                'c_x' = 'c_x' + 1

        if pressed_keys[K_RIGHT]:
                'c_x' = 'c_x' - 1
        
        if pressed_keys[K_UP]:
                'c_y' = 'c_y' + 1

        if pressed_keys[K_DOWN]:
                'c_y' = 'c_y' - 1

	def Intersect(c_x, c_y, e_x, e_y):
                if (c_x > e_x - 32) and (c_x < e_x + 32) and (c_y > e_y - 32) and (c_y < e_y + 32):
                        done = 1
                else:
                        done = 0

print "You lasted for", time.get_ticks()/1000, "seconds!"

error: inconsistent indentiation detection!

1) Your intentation is outright inncorrect (easy to fix), OR

2) Your intendation mixes tabs and spaces.

To fix case 2, change all tabs to spaces by using Edit ->Select All followed by format->Untablify rergion and specify the number of columns usede by each tab.