# coding:utf-8'''字典运算:查找字典中的最大最小值'''prices = {'ACME': 45.23,'AAPL': 612.78,'IBM': 205.55,'HPQ': 37.20,'FB': 10.75}# 对字典操作通过zip函数将键和值反转min_price = min(zip(prices.values(), prices.keys()))print(min_price)max_price = max(zip(prices.values(), prices.keys()))print(max_price)