Submission for tic tac toe lab.

What I changed
I completed checkpoints 1-3. I would have submitted all three separately, but a bug prohibited my initial submissions.
I also started working on the nim section of the lab.

Why I changed it
I made these changes in order to make a functions tic tac toe and nim game.

Estimate for remaining time to finish assignment: 15 minutes

nim/game.py

@@ -0,0 +1,50 @@
+class NimGame:
+
+    def get_initial_state(self):
+        return {
+            "board": [1, 3, 5, 7],
+            "first_player": True
+        }
+    
+    def get_next_state(self, state, action):
+        board = state["board"].copy()
+        row = action[0]
+        number_to_remove = action[1]
+        board[row] = board[row] - number_to_remove
+        next_state = {
+            "board": board,
+            "first_player": not state["first_player"],
+        }
+        return next_state
+    
+    def get_actions(self, state):
+        options = []
+        for num in range(4):
+            row = state["board"][num]
+            if row >=3:
+                options.append((num, 1))
+                options.append((num, 2))
+                options.append((num, 3))
+            elif row == 2:
+                options.append((num, 1))
+                options.append((num, 2))
+            elif row == 1:
+                options.append((num, 1))
+        return options
+    
+    def get_reward(self, state):
+        if state["first_player"]:
+            return 1
+        elif not state["first_player"]:
+            return -1
+        else:
+            return 0
+
+    def is_over(self, state):
+        for row in state["board"]:
+            if row != 0:
+                return False
+        return True
+
+    def get_objective(self, state):
+        return max if state["first_player"] else min

nim/player.py

@@ -1,10 +1,10 @@
-from nim.game_stub import NimGameStub
+from nim.game import NimGame
 from strategy.lookahead_strategy import LookaheadStrategy
 
 class HumanNimPlayer:
     def __init__(self, name):
         self.name = name
-        self.game = NimGameStub()
+        self.game = NimGame()
 
     def choose_action(self, state):
         actions = self.game.get_actions(state)
@@ -26,7 +26,7 @@ class HumanNimPlayer:
 class ComputerNimPlayer:
     def __init__(self, name):
         self.name = name
-        self.strategy = LookaheadStrategy(NimGameStub(), max_depth=3, deterministic=False)
+        self.strategy = LookaheadStrategy(NimGame(), max_depth=3, deterministic=False)
 
     def choose_action(self, state):
         action = self.strategy.choose_action(state)

nim/view.py

@@ -1,9 +1,9 @@
-from nim.game_stub import NimGameStub
+from nim.game import NimGame
 
 class NimView:
     def __init__(self, player0, player1):
         self.players = [player0, player1]
-        self.game = NimGameStub()
+        self.game = NimGame()
 
     def greet(self):
         print(f"{self.players[0].name} and {self.players[1].name}, welcome to Nim.")