字符串转 datetime

from datetime import datetime# 定义要转换的日期时间字符串
dt_str = "2021-09-30 15:48:36"# 使用datetime.strptime()函数进行转换
dt_obj = datetime.strptime(dt_str, "%Y-%m-%d %H:%M:%S")
print(dt_obj)

datetime 转字符串

from datetime import datetime
str_now = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
print(str_now)