#!/usr/bin/env python

def usage():
  print """ %s makes lines with numbers, incrementing startnumber by
step until endnumber is reached.  If the last argument is omitted, %s
does not print the numbers.

    Usage: $ %s startnumber step string1 endnumber string2

    Example: $ %s 1 1 ' part ' 3 ' meas 1[put space here]
        meas 2[put space here]
        meas 3 '

Strings need quotes if there is a space inside, or if the string is
empty, as "" or ''.  All arguments except string2 are required.  If step
is less than 1, it will be made 1, but other numbers may be negative.
Redirect output to file.

(c)2004 David Raleigh Arnold under GNU """ % (sys.argv[0],
 sys.argv[0], sys.argv[0], sys.argv[0])
  sys.exit(0)

import string, sys, os

try:
  length = len(sys.argv)
  if length<5:
    print "Too few arguments."
    usage()
  elif length>6:
    print "Too many arguments."
    usage()
  else:
    stnum = int(sys.argv[1])
    step = int(sys.argv[2])
    if step<1:
      step = 1
    strone = sys.argv[3]
    endnum = int(sys.argv[4])
    #strtwo = sys.argv[5]  
    while stnum<=endnum:
      if length==5: 
        print strone
      if length==6:
        strtwo = sys.argv[5] 
        print strone + str(stnum) + strtwo
      stnum = stnum + step  
  
except:
  sys.exit()
  #print "python errors:"
  #print sys.exc_type, sys.exc_value