Error-Handling und Player-Conversion

tictactoe.py

 from enum import Enum
 
 class Player(Enum):
+    undefined = 0
     one = 1
     two = 2
-    undefined = 3
+
+class TicTacToeError(Exception):
+    """TicTacToe Error"""
 
 class TicTacToe():
     def __init__(self) -> None:
@@ -11,6 +14,14 @@ class TicTacToe():
         for i in range(3):
             self.grid.append([Player.undefined, Player.undefined, Player.undefined])
 
+    def _get_player_from_int(self, player:Player|int) -> Player:
+        if isinstance(player, int):
+            try:
+                return Player(player)
+            except ValueError:
+                raise TicTacToeError("The player number is invalid. Only '1' and '2' are accepted")
+        return player
+
     def add(self, row:int, col:int, player:Player|int) -> bool:
         """ Change the value of a undefined field.
         The player can be passed as Player Object or plain Int.
@@ -18,10 +29,7 @@ class TicTacToe():
         Returns False, if the field is already occupied
         or the player number is invalid.
         """
-        if isinstance(player, int):
-            try: player = Player(player)
-            except ValueError: return False  # invalid player number
-
+        player = self._get_player_from_int(player)
         if self.check_field(row, col):
             self.grid[row][col] = player
             return True
@@ -49,6 +57,11 @@ class TicTacToe():
                 print("\n├───┼───┼───┤")
         print("\n└───┴───┴───┘\n")
 
+    def get_best_move(self, player:Player|int) -> tuple[int, int]:
+        return (0, 0)
+
+
+
 
 if __name__ == "__main__":
     ttt = TicTacToe()