Python list.sort()排序

List中字典指定元素排序

array = [{"score": "98", "name": "lili", "age": 19},
         {"score": "98", "name": "chenming", "age": 18},
         {"score": "88", "name": "wangxin", "age": 17}]

print("排序前：", array)
# 排序前： [{'score': '98', 'name': 'lili', 'age': 19}, {'score': '98', 'name': 'chenming', 'age': 18}, {'score': '88', 'name': 'wangxin', 'age': 17}]

array.sort(key=lambda x: x["score"])
print("指定单个元素排序：", array)
# 指定单个元素排序： [{'score': '88', 'name': 'wangxin', 'age': 17}, {'score': '98', 'name': 'lili', 'age': 19}, {'score': '98', 'name': 'chenming', 'age': 18}]

array.sort(key=lambda x: (x["score"], x["age"]))
print("指定多个元素排序：", array)
# 指定多个元素排序： [{'score': '88', 'name': 'wangxin', 'age': 17}, {'score': '98', 'name': 'chenming', 'age': 18}, {'score': '98', 'name': 'lili', 'age': 19}]

# list.sort()
alist = [1, 4, 2, 8, 5, 7, 6, 9, 3]
alist.sort()
print(alist)  # [1, 2, 3, 4, 5, 6, 7, 8, 9]

dict = [{"name": "AA", "age": 16}, {"name": "BB", "age": 14}]
# 按age倒序排序
result = sorted(dict, key=lambda x: x["age"], reverse=True)
print(result)  # [{'name': 'AA', 'age': 16}, {'name': 'BB', 'age': 14}]