def Command_Open():
    return

def Command_Save():
    return

def Command_Print():
    return

def Command_New():
    return

# Here we write a new function to get a string from
# the user and always return the capitalizd version.
# We can call the function anywhere such a string is
# desired.  Notice that the call to MyInput passes it
# the actual parameter "Enter a command --- ", which
# inside MyInput comes in as formal parameter Message,
# which is then passed straight on to the input function.

def MyInput (Message):          # Function to get a string and capitalize it
    S = input(Message)
    return S.upper()

def Main():
    MoreToDo = True
    while MoreToDo:
        Command = MyInput("Enter a command --- ")
        if   Command == "QUIT":  MoreToDo = False
        elif Command == "OPEN":  Command_Open()      # Call stub
        elif Command == "SAVE":  Command_Save()      # Call stub
        elif Command == "PRINT": Command_Print()     # Call stub
        elif Command == "NEW":   Command_New()       # Call stub
        elif Command == "EDIT":  pass                # Do nothing, replace with stub call later
        elif Command == "COPY":  pass                # Do nothing, replace with stub call later
        else:                    print ("Illegal Command")

    return