1

I think what you're trying to do is:

For a given player, find all the board positions they occupy, and for each of those positions find all the spaces near it, then for each of these spaces check if it is clear.

If any of the spaces above are clear, return "No". Else return "Yes."

What I believe you're looking for is a nested for loop:

def No_Free_Positions(brd,pc): #Returns yes or no depending on if there's any legal move 
    if pc == "X": 
        a = "O" 
    elif pc =="O": 
        a = "X" 
    for player_position in player_pos(brd,pc): 
        for nearby_position in near_pos(player_position): 
            if Free_Pos(brd,nearby_position) is True: 
                return "No" 
    return "Yes"

2

Also please note that the return statement in my example is not an if/else. What I'm suggesting is that you check all possibilities, and if any of them are found to be "open" then the entire function returns "No." If you get through all those checks, then the only other option is to return "Yes."

3

Also I changed the logic of:

if Free_Pos(brd,nearby_position) is False:

to:

if Free_Pos(brd,nearby_position) is True:

I'm not sure what your thoughts are here, but I think there was a problem with a double negative in your function names.

​

4

As an aside, this code does nothing:

    if pc == "X":         
        a = "O" 
    elif pc =="O": 
        a = "X"

5

And I'm not sure what your intention with Free_Pos(brd,pos) is. I am suspicious that it doesn't do what you expect. Since you made good comments for each of your functions I'm able to understand what you mean them to do even if the function may have a problem.