Python example: dictionary operations: finding the largest and smallest values in a dictionary

# 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)