auto save

demo.py

+#导入海龟库
+import turtle as t
+#导入随机数模块
+import random
+#创建画笔
+pen = t.Turtle()
+#设置画笔颜色
+pen.color("sienna")
+#设置画笔的速度
+pen.speed(0)
+#设置画布的大小
+w = t.Screen()
+w.bgcolor("wheat")#小麦色
+#移动到起点
+pen.left(90)
+pen.up()
+pen.backward(150)
+pen.down()
+#画树枝 创建tree函数
+def tree(n):
+    #判断n是否大于0
+    if n>=0:
+        if n<=12:
+            color_list = ["snow","lightcoral"]
+            color = random.choice(color_list)
+            pen.color(color)
+            pen.pensize(n/3)
+        else:
+            pen.color("sienna")#赭色
+            pen.pensize(n/10)
+        pen.forward(n)
+        angle = random.random()
+        pen.right(30*angle)
+        length = 1.5*random.random()
+        #调用tree函数
+        tree(n-10*length)
+        pen.left(60*angle)
+        tree(n-10*length)
+        pen.right(30*angle)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+tree(60)
+t.done()
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diy.py

@@ -3,12 +3,13 @@
 cost= {'苹果':5.2,'山竹':12.9,'香蕉':2.4,'荔枝':15,'葡萄':9.3,'桂圆':8,'蓝莓':10,'李子':8}
 k=input('请输入水果名称：')
 v=input('请输入水果价钱：')
-# ?补充条件判断:
-    if # ?:
-        # ?更新价钱
+if k in cost:
+    if float(v)<cost[k]:
+        cost[k]=float(v)
         print(k+'降价了，现价'+v+'元')
     else:
         print(k+'涨价了，我们不买')
 else:
     cost[k] = float(v)
     print(k+'的价钱'+v+'元已上传~')
+    #魏诗航 
\ No newline at end of file