/home/work/scripting/src/py/intro/datatrans2.py
      7     print "Usage:",sys.argv[0], "infile outfile"; sys.exit(1)
      8
----> 9 ifile = open(infilename, 'r')  # open file for reading
     10 lines = ifile.readlines()      # read file into list of lines
     11 ifile.close()

IOError: [Errno 2] No such file or directory: 'infile'
> /home/work/scripting/src/py/intro/datatrans2.py(9)?()
-> ifile = open(infilename, 'r')  # open file for reading
(Pdb) print infilename
infile