''' seq1.py Purpose: To act somewhat like the Unix seq command. Author: Vasudev Ram Copyright 2017 Vasudev Ram Web site: https://vasudevram.github.io Blog: https://jugad2.blogspot.com Product store: https://gumroad.com/vasudevram ''' import sys def main(): sa, lsa = sys.argv, len(sys.argv) if lsa < 2: sys.exit(1) try: start = 1 if lsa == 2: end = int(sa[1]) elif lsa == 3: start = int(sa[1]) end = int(sa[2]) else: # lsa > 3 sys.exit(1) except ValueError as ve: sys.exit(1) for num in xrange(start, end + 1): print num, sys.exit(0) if __name__ == '__main__': main()