python datetime模块安装_Python datetime模块的使用示例

1、获取当前年月日时分秒

# -*- 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))

2、datetime转为string

# -*- 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))

3、string转为datetime

# -*- 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)

4、时间相加

# -*- 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:\t\t\t\t{}'.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:\t{}'.format(add_end))

5、时间相减

①两个时间差

# -*- 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:\t{}'.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:\t{}'.format(time_date2))

time_date3 = time_date2 - time_date

print('时间差:{}'.format(time_date3))

②减去1天2个小时3分钟4秒(加负数)

# -*- 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:\t\t\t\t{}'.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:\t{}'.format(add_end))

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