Demo/scripts/primes.py

   1 #! /usr/bin/env python
   2
   3 # Print prime numbers in a given range
   4
   5 def main():
   6     import sys
   7     min, max = 2, 0x7fffffff
   8     if sys.argv[1:]:
   9         min = int(eval(sys.argv[1]))
  10         if sys.argv[2:]:
  11             max = int(eval(sys.argv[2]))
  12     primes(min, max)
  13
  14 def primes(min, max):
  15     if 2 >= min: print(2)
  16     primes = [2]
  17     i = 3
  18     while i <= max:
  19         for p in primes:
  20             if i%p == 0 or p*p > i: break
  21         if i%p != 0:
  22             primes.append(i)
  23             if i >= min: print(i)
  24         i = i+2
  25
  26 if __name__ == "__main__":
  27     main()