operator, itertools

import operator

import itertools

info_list = [
    {'name': 'Quinn', 'age': 50},
    {'name': 'Ryan', 'age': 18},
    {'name': 'May', 'age': 30}
]

new_list = sorted(info_list, key=operator.itemgetter('age'))
print(new_list)
# 同理, 若是對屬性排序, 能夠用sorted(obj_list, operator.attrgetter('attribute'))
# [{'name': 'Ryan', 'age': 18}, {'name': 'May', 'age': 30}, {'name': 'Quinn', 'age': 50}]


a = [1, 5, 9, 2]
b = [7, 77, 5, 8]
print(itertools.chain(a, b))  # <itertools.chain object at 0x00000088F43454E0>
print(list(itertools.chain(a, b)))  # [1, 5, 9, 2, 7, 77, 5, 8]


# 重複操做的判斷問題

# 能夠利用redis.setnx 返回結果(True, False) 來加鎖, 若是爲False ,則證實當前已操做(已經設置過值了,可是須要時間), 提示勿重複操做