在python中 - 在嵌套字典中查找最大日期

from datetime import datetime

nested_dict = {
    "a": "date1",
    "b": "date2",
    "c": {"d": "date3", "e": "date4"}
}

max_date = datetime(2022, 1, 1)

for key, value in nested_dict.items():
    if isinstance(value, dict):
        max_date = max(max_date, datetime.strptime(value, "%Y-%m-%d"))

max_date = max(max_date, datetime.strptime(value, "%Y-%m-%d"))

print(max_date)

2022-01-01 00:00:00