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diy1.py

+import turtle  # 导入turtle模块
+
+pen=turtle.Pen()  # 调用turtle模块的Pen()方法并赋值给画笔变量pen
+screen=turtle.Screen()  # 从turtle模块中取出画布
+screen.bgcolor("black")  # 用bgcolor()方法，将画布设为黑色
+colors=["green","red","orange","yellow"]
+for i in range(1,300):  # for循环用range()方法重复执行300次
+    # 变量i对4求余后作为列表的索引号并设为pencolor()参数（画笔每4次画一个颜色）
+    pen.pencolor(colors[i%4])
+    pen.forward(i) # 画笔移动的距离
+    pen.right(91)  # 右转91
+pen.hideturtle()  # 隐藏画笔
+turtle.done()  # 暂停程序，停止画笔绘制
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diy2.py

+j = 5  # 列
+i = 7  # 行
+print(j, '*', i,'=', (j * i))  # 打印吃列行相乘及结果
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diy3.py

+i=1  # 行
+for j in range(1,10):   # 列
+    print(j, '*', i,'=', (j * i), end="  ")  # 打印出第一行乘法算式
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diy4.py

+for i in range(1, 10):  # for循环，行
+    for j in range(1, i+1):  # for循环，列，参数2行+1
+        print(j, '*', i, '=', (j * i), end='  ')  # 打印出九九乘法算式
+    print() # 打印出
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