[Question 4] Powerball number generator

Description To win the Powerball lottery (an extremely unlikely event so don't waste your time) you have to pick six numbers correctly. The first five numbers are drawn from a drum containing 53 balls and the sixth is drawn from a drum containing 42 balls. The chances of doing this are 1 in 120,526,770. Write a program to generate a set of Powerball numbers by utilizing the choice function in Python's random module. Input Ask the user how many sets of Powerball numbers he or she would like. Output The program will print each set of Powerball numbers in numeric order. Sample session Official (but fruitless) Powerball number generator How many sets of numbers? 3 Your numbers: 3 12 14 26 47 Powerball: 2 Your numbers: 1 4 31 34 51 Powerball: 17 Your numbers: 10 12 49 50 53 Powerball: 35

#! /usr/bin/env python
import random

print 'Official (but fruitless) Powerball number generator'

set_number = int(raw_input('How many sets of numbers?'))

while set_number > 0: 
   set_number = set_number - 1

   a = []
   while 1 :
          random_number=int(random.random()*100)
          if (random_number > 0 and random_number < 54 ): 
              a.append(random_number)
          if len(a) == 5 :
              break 

   b = []
   while 1 :
          random_number=int(random.random()*100)
          if (random_number > 0 and random_number < 43 ): 
              b.append(random_number)
              break

# , is very important. It can print the word at one line.
   print 'Your numbers:',  
# format the print '%2d' keep every one have two space to write in.
   while len(a) > 0:
          print '%2d'%a.pop(),
   

   print '   Powerball:', b.pop()