save project

diy.py

+pop={'生菜':3.01,'西瓜':5.5,'土豆':3.5}
+r=input('输入蔬菜')
+m=input('蔬菜价格')
+if r in pop:
+    if m<pop[r]:
+        pop[r]=int(m)
+        print()
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