auto save

diy2.py

+dict = {'农夫山泉':1,'奥利奥':10}
+k = input('你要买什么？')
+x = input('你要买几个？')
+if k in dict:
+    print('买' + k +'需要' + str(int(x)*(dict[k])) + '元')
+else:
+    print('该商品暂时缺货')
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