Generates a file with one random number per line.

generate_big_file.py

#!/usr/bin/env python
from sys import argv, exit
import random

big_file_name = "big_file.txt"
max_size_of_number = 1000000
random.seed(123)

if len(argv) != 2:
  print "Usage: %s Num_Lines" % __file__
  exit()
num_lines = int(argv[1])
print "Going to generante big file with %s lines, one random number per line" % (num_lines)

big_file = open(big_file_name, "w", 500000)
for i in range(0, num_lines):
  num = random.randint(0,max_size_of_number)
  big_file.write(str(num) + '\n')
big_file.close()