# Put appropriate comments including your name, and a description
# of what the program does at the top of this file

from graphics import *
from string import *

# Get the input file name from user by getting the text of the "Entry object"
# after the user clicks in the window with the mouse.
# The button is simply a text field that gives feedback to the user
# This function should return the input file opend for reading
def getInputFile(window, entry, button):
    # get file from user
    # Use a while loop and exception handling to check that
    # the file exists.
    # If file does not exist (IOError should be caught),
    # Display appropriate message on button and give user another opportunity
    # to enter the name of a file that exists.
    # When the user enters the name of a file that exists,
    # Give appropriate feedback and break
    # out of the while loop
    # REPLACE WITH YOUR CODE

    return inFile


# Find the sum and count of the numbers in the given line.
# Returns a pair of #s consisting of the given line's sum + old_sum
# and the given line's count of # of numbers found + old_count.
def updateSumAndCount(line, old_sum, old_count):
    pass # replace with your code

    
# Reads numbers from the given file, which must already be open
# for reading,
# and returns the mean and count of all the numbers found.
def computeMeanAndCount(the_file):
    # Hint:  This function should call updateSumAndCount()
    pass # replace with your code
    


# create the Graphical User Interface and run the program.
def main():
    # Fill in your code to create the GUI
    # This function should also run the program
    
    # Can use a mouse click event to terminate the program
    # Don't forget to close the window you created
    # replace with your code


main()