【python】时间处理

获取当前时间

from time import strftime, localtime
local_time=strftime('%Y-%m-%d %H:%M:%S', localtime())

获取今天日期

tody = (datetime.date.today()).strftime('%Y-%m-%d')

时间转换成时间戳

import time
from datetime import datetime

time_stamp = int(time.mktime(
            datetime.strptime(my_time_str, "%Y-%m-%d %H:%M:%S").timetuple()))

时间戳转换成时间

import time

timestamp = 1462451334

#转换成localtime
time_local = time.localtime(timestamp)
#转换成新的时间格式(2016-05-05 20:28:54)
dt = time.strftime("%Y-%m-%d %H:%M:%S",time_local)

获取N天前或之后的日期

from datetime import datetime, timedelta

now_time = datetime.now()
#选择要提前的天数n
change_time = now_time + timedelta(days=n)
#格式化处理
change_time_format = change_time.strftime('%Y-%m-%d %H:%M:%S')

获取当前时间和（几天后或几天前的时间）

from datetime import datetime, timedelta
    now_time = datetime.now()
    # 格式化处理
    end_time = now_time.strftime('%Y-%m-%d %H:%M:%S')

    # 选择要提前的天数n
    change_time = now_time + timedelta(days=-1)
    # 格式化处理
    start_time = change_time.strftime('%Y-%m-%d %H:%M:%S')

获取某一天的每个小时的时间戳（毫秒）

def get_more_timestamp():
    day=30 #获取日期为30日的时间戳（比如5月30日）
    for i in range(0,24):
        if i <23:
            start_time=int(datetime.now().replace(day=day,hour=i,minute=0,second=0).timestamp())*1000
            end_time=int(datetime.now().replace(day=day,hour=i+1,minute=0,second=0).timestamp())*1000
            str='start_time=%s,end_time=%s'%(start_time,end_time)
            print(str)
        else:
            start_time = int(datetime.now().replace(day=day, hour=i, minute=0, second=0).timestamp()) * 1000
            end_time = int(datetime.now().replace(day=day, hour=i, minute=59, second=59).timestamp()) * 1000
            str = 'start_time=%s,end_time=%s' % (start_time, end_time)
            print(str)

时间字符串修改格式

old_time_str='2021-12-29T14:16:25'
eventTime = datetime.datetime.strptime(time_str, '%Y-%m-%dT%H:%M:%S')
new_time_str=eventTime.strftime('%Y-%m-%d %H:%M:%S')

计算某个日期距离几天的差值

value=‘2022-02-15’
now_str = datetime.now().strftime('%Y-%m-%d')
start_day = datetime.strptime(now_str, "%Y-%m-%d")
end_day = datetime.strptime(value, '%Y-%m-%d')
days = int((end_day - start_day).days)