auto save

diy.py

@@ -3,9 +3,9 @@
 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:# ?补充条件判断:
+    if float(v)<cost[k]:# ?:
+        cost[k]=float(v)# ?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

+# dict={'F':70,'C':67,'h':104,'i':105,'s':115}
+# print(dict['C'])
+# student={'Jonh':10,'Sam':11,'Lily':9,'Anna':10,'Daming':10,'Helen':12}
+# student['Lily']=10
+# student['小红']=11
+# print(student)
+
+steamer={'第一格':'猪八戒'}
+steamer['第一格']='唐三藏'
+steamer['第二格']='假行者'
+steamer['第三格']='沙和尚'
+steamer['第四格']='猪八戒'
+print(steamer)
+print(steamer['第四格'])
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