1 #!/usr/bin/env python
   2 
   3 fl = raw_input("If you want to scan the file L5058011_01120090712_MTL.txt , type L5 and press enter!                         \n if you wish to scan any other file, enter the complete filename!")
   4 
   5 print"\n\n\n"
   6 
   7 print "you entered ", fl
   8 
   9 
  10 print"\n\n\n"
  11 
  12 
  13 if fl=="L5":
  14     infile = open("L5058011_01120090712_MTL.txt","r")
  15 else: 
  16     infile = open(fl,"r")
  17 
  18 
  19 
  20 text = infile.readlines()
  21 strt = raw_input("line starting with? ")
  22 
  23 print"\n\n\n"
  24 print "you entered ", strt
  25 print"\n\n\n"
  26 print "the following lines begin with",strt
  27 
  28 for line in text:
  29     line_stripped=line.strip()
  30     if line_stripped.startswith(strt)==True:
  31         print line