[Python] For loop with list indexes Python

I have this code that is supposed to print each item in the main list on a new row with a corresponding row number. In the below code it works fine:

my_list = [["a", "b", "c"], ["d", "e", "f"], ["g", "h", "i"]]
for item in my_list:
print(my_list.index(item)+1, item)


However when I try to implement it into a "tic-tac-toe" game I'm making it doesn't work.

Here is the problematic code:

def showGrid(y, x, "X"):
board[y][x] = "X"
print(" x x x")
for row in board:
print(board.index(row)+1, sub("[,']", "", str(row)[1:-1]))


The output of the code above is not the same as the first example and instead it gives a random output depending on what the y and x values are.

For example if y and x were both set to 1 the output is:

x x x
1 X - -
2 - - -
2 - - -


And when x and y are both set to 2 the output is:

x x x
1 - - -
2 - X -
1 - - -


What I want it to be is 1 2 3 going down.

If there is a page that covers this please link it. If more of the code is needed please say so. Otherwise thanks in advance.

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