auto save

1.py

+import turtle
+turtle.speed(1)
+turtle.penup()
+turtle.goto(-100,100)
+turtle.pendown()
+for i in range(4):
+    turtle.forward(200)
+    turtle.right(90)
+turtle.goto(0,100)
+turtle.color("black","red")
+turtle.begin_fill()
+turtle.goto(100,0)
+turtle.goto(0,-100)
+turtle.goto(-100,0)
+turtle.goto(0,100)
+turtle.end_fill()
+turtle.hideturtle()
+turtle.done()
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2.py

+a=int(input("乌龟爬行的速度："))
+b=100/a
+print("乌龟能够追上兔子的时间为：",b,"秒",sep="")

3.py

+# a=float(input("输入半径："))
+# pi=3.14
+# print("圆的周长是%.2f,面积是%.2f"%(2*pi*a,pi*a**2))
+# print("圆的周长是{:.2f},面积是{:.2f}".format(2*pi*a,pi*a**2))
+a=10
+print(eval('a+10'))
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snake.py

@@ -13,6 +13,7 @@ right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
 x,y=240, 120
+pos=[(180, 90),(180, 120),(210, 120),(x,y)]
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
@@ -20,15 +21,18 @@ while True:
             exit()
     # 将背景图画上去
     x+=30
+    pos.append((x,y))
+    pos.pop(0)
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right, (x, y))
+    screen.blit(right, pos[-1])
     # 将贪吃蛇的身体画上去
-    screen.blit(body, (210, 120))
-    screen.blit(body, (180, 120))
-    screen.blit(body, (180, 90))
+    for i in range(len(pos)-1):
+        screen.blit(body, pos[i])
+    # screen.blit(body, (180, 120))
+    # screen.blit(body, (180, 90))
     # 将果实画上去
     screen.blit(food, (360, 300))
     # 刷新画面
     pygame.display.update()
-    a.tick(100)
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+    a.tick(3)
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