Create app.py

app.py

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+import streamlit as st
+
+# Initialize the board and game state
+if "board" not in st.session_state:
+    st.session_state.board = [""] * 9
+    st.session_state.current_player = "X"
+    st.session_state.winner = None
+
+def check_winner(board):
+    win_conditions = [
+        [0,1,2], [3,4,5], [6,7,8],  # rows
+        [0,3,6], [1,4,7], [2,5,8],  # cols
+        [0,4,8], [2,4,6]            # diagonals
+    ]
+    for condition in win_conditions:
+        a, b, c = condition
+        if board[a] and board[a] == board[b] == board[c]:
+            return board[a]
+    if all(cell != "" for cell in board):
+        return "Draw"
+    return None
+
+def restart_game():
+    st.session_state.board = [""] * 9
+    st.session_state.current_player = "X"
+    st.session_state.winner = None
+
+st.title("🎮 Tic Tac Toe Game")
+st.markdown("Play against a friend in the browser!")
+
+# Game board layout
+cols = st.columns(3)
+for i in range(3):
+    for j in range(3):
+        idx = i * 3 + j
+        with cols[j]:
+            if st.button(st.session_state.board[idx] or " ", key=idx, use_container_width=True):
+                if not st.session_state.board[idx] and not st.session_state.winner:
+                    st.session_state.board[idx] = st.session_state.current_player
+                    st.session_state.winner = check_winner(st.session_state.board)
+                    if not st.session_state.winner:
+                        st.session_state.current_player = "O" if st.session_state.current_player == "X" else "X"
+
+# Display result
+if st.session_state.winner:
+    if st.session_state.winner == "Draw":
+        st.success("It's a draw!")
+    else:
+        st.success(f"Player {st.session_state.winner} wins!")
+
+st.button("🔁 Restart Game", on_click=restart_game)