auto save

1.py

+import turtle
+pen=turtle.Pen()
+r=10
+pen.penup()
+pen.goto(0,-10)
+for i in range(4):
+    pen.pendown()
+    pen.circle(r)
+    r=r+40
+    pen.penup()
+    pen.goto(0,-r)
+
+
+
+turtle.done()
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2.py

+import turtle
+pen=turtle.Pen()
+pen.penup()
+pen.goto(0,-200)
+pen.pendown()
+pen.circle(200)
+pen.penup()
+pen.fillcolor("blue")
+pen.begin_fill()
+pen.goto(-100,50)
+pen.pendown()
+pen.circle(20)
+pen.end_fill()
+pen.penup()
+pen.begin_fill()
+pen.goto(100,50)
+pen.pendown()
+pen.circle(20)
+pen.end_fill()

diy.py

@@ -4,8 +4,8 @@ cost= {'苹果':5.2,'山竹':12.9,'香蕉':2.4,'荔枝':15,'葡萄':9.3,'桂圆'
 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 int(v)<cost[k]:# ?更新价钱
         print(k+'降价了，现价'+v+'元')
     else:
         print(k+'涨价了，我们不买')

test.py

+a=input("请输入一个三位数整数") #456
+b=[]
+for i in a:  #遍历
+    b.append(i)
+print('百：'+b[0],'十：'+b[1],'个：'+b[2])
+#将三位数拆成一个个数字存入列表，再将列表中的元素输出
+
+
+a=[7,1,2,3,4]
+a.pop(0)
+a.clear()
+a.insert(0,7)
+len(a)
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