from operator import itemgetter
json_array = [{"time": 20150312, "value": "c"}, {"time": 20150301, "value": "a"}, {"time": 20150305, "value": "b"}]
json_array.sort(key=lambda x: x["time"], reverse=False) # reverse=False 升序，True是降序
#或使用sorted函数
# new_json_array= sorted(json_array,key=lambda x:x["time"]) # 升序
print(sorted(json_array, key=itemgetter('value'), reverse=True)) # 降序，需要导入：from operator import itemgetter
# 根据某个key的最小值取
print(min(json_array, key=itemgetter('value')))
# 取最大值
print(max(json_array, key=itemgetter('time')))
print(json_array)
