feat(第7讲 字母卡牌): 实现记忆游戏并添加开始界面

- 新增 jiyi.py 文件，实现字母翻牌记忆游戏功能
- 添加 youxijiemian.py 文件，创建游戏开始界面
- 使用 turtle 和 tkinter 模块分别实现游戏和界面
- 支持选择不同难度的游戏模式

test.py

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+import turtle
+turtle.listen()
+turtle.onscreenclick(print)
+turtle.done()

第17讲中国地图我来拼(二)/课堂成果/README.md

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+```bash
+pip install pgzrun -i https://pypi.tuna.tsinghua.edu.cn/simple
+```

第2讲弹幕/课堂成果/README.md

@@ -1,3 +1,3 @@
 ```bash
-pip install pillow -i https://pypi.tuna.tsinghua.edu.cn/simple
+pip install pillow amzqr -i https://pypi.tuna.tsinghua.edu.cn/simple
 ```

第6讲太阳系/课堂成果/base.py

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+import turtle
+
+qipan=[(-50,150),(50,150),(-150,50),(-150,-50)]
+
+t1=turtle.Turtle()
+t1.hideturtle()
+for i in qipan:
+    t1.penup()
+    t1.goto(i[0], i[1])
+    t1.pendown()
+    if qipan.index(i)<=1:
+        t1.setheading(-90)
+        t1.forward(300)
+    else:
+        t1.setheading(0)
+        t1.forward(300)
+
+text1="O"
+text2="X"
+num = 0
+
+def click(x,y):
+    global num
+    t1.penup()
+    t1.goto(x-20,y-40)
+    t1.pendown()
+    if num%2==0:
+        t1.write(text1, font=("Arial", 50, "normal"))
+    else:
+        t1.write(text2, font=("Arial", 50, "normal"))
+    num+=1
+
+turtle.listen()
+turtle.onscreenclick(click)
+turtle.done()

第6讲太阳系/课堂成果/井字棋.py

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+import tkinter as tk
+from tkinter import messagebox
+
+class SneakyTicTacToe:
+    def __init__(self, root):
+        self.root = root
+
+        self.size = 7  # 实际棋盘大小
+        self.board = [["" for _ in range(self.size)] for _ in range(self.size)]
+        self.current_player = "X"
+
+        self.buttons = [[None for _ in range(self.size)] for _ in range(self.size)]
+
+        for i in range(self.size):
+            for j in range(self.size):
+                btn = tk.Button(root, text="", font=("Arial", 24), width=3, height=1,
+                                command=lambda r=i, c=j: self.on_click(r, c))
+                btn.grid(row=i+1, column=j)
+                self.buttons[i][j] = btn
+
+        # 默认只设置窗口足够显示中心3x3
+        root.geometry(f"{3*65}x{3*65}")  # 宽x高像素，+40 留状态栏
+
+    def on_click(self, r, c):
+        if self.board[r][c] != "":
+            return
+        self.board[r][c] = self.current_player
+        self.buttons[r][c].config(text=self.current_player)
+
+        if self.check_winner(self.current_player):
+            messagebox.showinfo("🎉 游戏结束", f"玩家 {self.current_player} 获胜！")
+            self.reset()
+        elif self.is_draw():
+            messagebox.showinfo("😐 游戏结束", "平局")
+            self.reset()
+        else:
+            self.current_player = "O" if self.current_player == "X" else "X"
+            self.status.config(text=f"当前轮到: {self.current_player}")
+
+    def check_winner(self, player):
+        for i in range(self.size):
+            for j in range(self.size):
+                if j + 2 < self.size and all(self.board[i][j+k] == player for k in range(3)):
+                    return True
+                if i + 2 < self.size and all(self.board[i+k][j] == player for k in range(3)):
+                    return True
+                if i + 2 < self.size and j + 2 < self.size and all(self.board[i+k][j+k] == player for k in range(3)):
+                    return True
+                if i + 2 < self.size and j - 2 >= 0 and all(self.board[i+k][j-k] == player for k in range(3)):
+                    return True
+        return False
+
+    def is_draw(self):
+        return all(self.board[i][j] != "" for i in range(self.size) for j in range(self.size))
+
+    def reset(self):
+        for i in range(self.size):
+            for j in range(self.size):
+                self.board[i][j] = ""
+                self.buttons[i][j].config(text="")
+        self.current_player = "X"
+        self.status.config(text="当前轮到: X")
+
+# 启动游戏
+if __name__ == "__main__":
+    root = tk.Tk()
+    game = SneakyTicTacToe(root)
+    root.mainloop()

第6讲太阳系/课堂成果/简单井字棋.py

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+import turtle
+
+# 设置屏幕和画笔
+screen = turtle.Screen()
+screen.title("简易井字棋")
+pen = turtle.Turtle()
+pen.hideturtle()
+pen.speed(0)
+pen.pensize(3)
+
+# 当前玩家（X 先手）
+current_player = "X"
+# 保存每格的内容（3x3）
+board = [["" for _ in range(3)] for _ in range(3)]
+
+# 画井字棋的格子
+def draw_board():
+    for i in range(0, 3):  # 画2条竖线
+        pen.penup()
+        pen.goto(-100 + i * 100, -150)
+        pen.pendown()
+        pen.goto(-100 + i * 100, 150)
+    for i in range(0, 3):  # 画2条横线
+        pen.penup()
+        pen.goto(-150, -100 + i * 100)
+        pen.pendown()
+        pen.goto(150, -100 + i * 100)
+
+# 在某个格子画 X 或 O
+def draw_symbol(row, col, symbol):
+    x = -150 + col * 100 + 50
+    y = 150 - row * 100 - 90
+    pen.penup()
+    pen.goto(x, y)
+    pen.write(symbol, align="center", font=("Arial", 36, "bold"))
+
+# 处理点击事件
+def click(x, y):
+    global current_player
+    # 将坐标转换为格子位置
+    if not (-150 < x < 150 and -150 < y < 150):
+        return
+    col = int((x + 150) // 100)
+    row = int((150 - y) // 100)
+    if board[row][col] == "":
+        board[row][col] = current_player
+        draw_symbol(row, col, current_player)
+        # 切换玩家
+        current_player = "O" if current_player == "X" else "X"
+
+# 运行程序
+draw_board()
+screen.onclick(click)
+screen.mainloop()