Python datetime模块的使用示例

# -*- encoding=utf-8 -*-
import datetime
now = datetime.datetime.now()
print("now:{}".format(now))
year = now.year
print("year:{}".format(year))
month = now.month
print("month:{}".format(month))
day = now.day
print("day:{}".format(day))
hour = now.hour
print("hour:{}".format(hour))
minute = now.minute
print("minute:{}".format(minute))
second = now.second
print("second:{}".format(second))

# -*- encoding=utf-8 -*-
import datetime
now = datetime.datetime.now()
print("type:{}".format(type(now)))
print("now datetime:{}".format(now))
now_string = now.strftime("%Y-%m-%d %H:%M:%S")
print("type:{}".format(type(now_string)))
print("now string:{}".format(now_string))

# -*- encoding=utf-8 -*-
import datetime
time_str = "2021-01-28 10:51:26"
time_date = datetime.datetime.strptime(time_str, "%Y-%m-%d %H:%M:%S")
print("type:{}".format(type(time_date)))
print(time_date)

# -*- encoding=utf-8 -*-
import datetime
time_str = "2021-01-28 10:00:00"
time_date = datetime.datetime.strptime(time_str, "%Y-%m-%d %H:%M:%S")
print("原始时间:				{}".format(time_date))
add_info = datetime.timedelta(days=1, hours=2, minutes=3, seconds=4)
add_end = time_date + add_info
print("加上1天2个小时3分钟4秒后:	{}".format(add_end))

# -*- encoding=utf-8 -*-
import datetime
time_str = "2021-01-28 10:00:00"
time_date = datetime.datetime.strptime(time_str, "%Y-%m-%d %H:%M:%S")
print("原始时间:	{}".format(time_date))
time_str = "2021-05-29 12:12:12"
time_date2 = datetime.datetime.strptime(time_str, "%Y-%m-%d %H:%M:%S")
print("原始时间2:	{}".format(time_date2))
time_date3 = time_date2 - time_date
print("时间差:{}".format(time_date3))

# -*- encoding=utf-8 -*-
import datetime
time_str = "2021-01-28 10:00:00"
time_date = datetime.datetime.strptime(time_str, "%Y-%m-%d %H:%M:%S")
print("原始时间:				{}".format(time_date))
add_info = datetime.timedelta(days=-1, hours=-2, minutes=-3, seconds=-4)
add_end = time_date + add_info
print("减去1天2个小时3分钟4秒后:	{}".format(add_end))