Keys can be anything......including a tuple (row,col) #2
Description
For layouts like this, a grid, I like to use TUPLES as the key for the buttons. This is what I did in the Chess game from what I recall. I've done it a number of times in demo programs too. The Table Simulation demo program uses one of these kinds of keys.
There is no need to turn your row and column variables into strings so that they can be made into a "key".
Instead of this:
key=str(row)+','+str(col)
You can do this:
key=row,col
There is no requirement that keys be strings. They can be anything you want, including a tuple. When one of these buttons is clicked, the event that's returned is row, col.
Then, later, if you want to lookup that Button Element you can use FindElement (or the shortened version Element)....
button = window.Element((row,col))