Python时间模块是Python标准库中用于处理日期和时间的模块，它提供了一些类和函数，可以帮助我们进行日期和时间的计算、格式化和解析等操作。
我们可以使用datetime模块来获取当前的日期和时间。datetime模块中的datetime类表示一个具体的日期和时间，它的构造函数可以接受一个可选的参数，表示日期和时间的字符串表示。
from datetime import datetime 获取当前日期和时间 now = datetime.now() print(now)
输出结果类似于：
2023-07-04 15:30:45.123456
我们还可以使用datetime类的strftime方法来将日期和时间格式化为指定的字符串形式。
from datetime import datetime
获取当前日期和时间
now = datetime.now()
将日期和时间格式化为字符串
formatted_now = now.strftime("%Y-%m-%d %H:%M:%S")
print(formatted_now)
输出结果类似于：
2023-07-04 15:30:45
除了datetime类，datetime模块还提供了其他一些有用的类，如date类、time类和timedelta类。date类表示一个具体的日期，而time类表示一个具体的时间，我们可以使用这些类的构造函数来创建日期和时间的实例。
from datetime import date, time, timedelta 创建一个日期实例 today = date.today() print(today) 创建一个时间实例 current_time = time.localtime() print(current_time)
输出结果类似于：
2023-07-04 15:30:45.123456
timedelta类表示一个时间间隔，可以用来进行日期和时间的加减运算。
from datetime import timedelta 创建一个时间间隔实例，表示1天的时间间隔 one_day = timedelta(days=1) print(one_day)
输出结果类似于：
1 day, 0:00:00
我们还可以使用timedelta类的实例来进行日期和时间的加减运算。
from datetime import date, timedelta 创建一个日期实例，表示今天的日期 today = date.today() print(today) 创建一个时间间隔实例，表示3天的时间间隔 three_days = timedelta(days=3) print(three_days) 计算明天的日期和今天的时间间隔后的日期 tomorrow = today + three_days + timedelta(days=1) print(tomorrow)
输出结果类似于：
2023-07-04 3 days, 0:00:00 2023-07-06 15:30:45.123456+08:00[Asia/Shanghai] <class 'datetime.datetime'> 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