# Author:  James Tam
# Version: March 23 2010
  
#  A program by James Tam that reads in letter grades from a file 
# and displays the grades onscreen.  

# Get information about the file name at run time from the user.   
inputFileName = raw_input ("Enter name of input file: ")

inputFileOK = False
while (inputFileOK == False):
   # Open file for reading, confirm file with user.
   try:
      inputFile = open (inputFileName, "r")
      inputFileOK = True
   except IOError:
      inputFileOK = False
      print "File", inputFileName, "could not be opened"
   else:
      # Update user on what is happening.
      print "Opening file", inputFileName, " for reading."
   
      # While we haven't read past the end of the file continue reading from
      # it.

      for line in inputFile:
         print line,
      print "Completed reading of file", inputFileName,
   finally:
      # Finished writing to file, provide feedback to user and close file.
      inputFile.close()
      print "Closed file", inputFileName