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To switch players back and forth during a game of battleships coded in Python, you can use a boolean variable to keep track of whose turn it is.

For example, you can initialize a variable called "player1turn" to True, which means that it is player 1's turn to play. After player 1 makes a move, you can set "player1turn" to False and "player2_turn" to True, indicating that it is now player 2's turn.

To switch back to player 1's turn, you can switch the values again. Here is an example code snippet:

player1_turn = True
player2_turn = False

# Game loop
while game_not_over:
    if player1_turn:
        # Player 1's turn to make a move
        # ...
        player1_turn = False
        player2_turn = True
    elif player2_turn:
        # Player 2's turn to make a move
        # ...
        player1_turn = True
        player2_turn = False

In this example code, the "if" statement checks which player's turn it is and executes the corresponding code block. After the current player makes a move, the turn is switched to the other player by setting their boolean variable to True and the previous player's variable to False. The game loop then continues until the game is over.