data from multiple Entry widgets

[deanhystad]

The array is not the problem. If you did this

xxx[a,b,c] = Entry(root....)
xxx[a,b,c].grid(...

You would have a list of entry widgets that you could later use like this:

values[a,b,c] = xxx[a,b,c].get()

The problem you were having had to do with not knowing that .grid returns None and not saving the values returned by get(). You would have the same problem if you used independent variables.