如何从datetime中获取新时间

from datetime import datetime
current_time = datetime.now()

from datetime import datetime
current_time = datetime.now()
formatted_time = current_time.strftime("%Y-%m-%d %H:%M:%S")

from datetime import datetime, date
specified_date = date(2022, 1, 1)  # 指定日期为2022年1月1日
specified_datetime = datetime.combine(specified_date, datetime.min.time())  # 将指定日期转换为datetime对象
specified_time = specified_datetime.time()  # 获取指定日期的时间

from datetime import datetime, timedelta
current_time = datetime.now()
previous_time = current_time - timedelta(days=1)  # 获取前一天的时间