Python中字典列表中的最大值或最新值

data = [
    {'name': 'A', 'value': 10},
    {'name': 'B', 'value': 20},
    {'name': 'C', 'value': 15}
]

max_value_item = max(data, key=lambda x: x['value'])
print(max_value_item)  # 输出：{'name': 'B', 'value': 20}

from datetime import datetime

data = [
    {'name': 'A', 'timestamp': datetime(2023, 1, 1)},
    {'name': 'B', 'timestamp': datetime(2023, 1, 3)},
    {'name': 'C', 'timestamp': datetime(2023, 1, 2)}
]

latest_item = max(data, key=lambda x: x['timestamp'])
print(latest_item)  # 输出：{'name': 'B', 'timestamp': datetime.datetime(2023, 1, 3, 0, 0)}

max_value_item = max(data, key=lambda x: x.get('value', float('-inf')))

if data:
    max_value_item = max(data, key=lambda x: x['value'])
else:
    max_value_item = None