Python日期时间获取和转换

5、时间日期：
1）
import time
localtime = time.asctime( time.localtime(time.time()) )
print "本地时间为 :", localtime
以上实例输出结果：
本地时间为 : Thu Apr 7 10:05:21 2016

local_time = time.localtime(time.time())
create_time = time.strftime('%Y-%m-%d %H:%M:%S', local_time) # 采集创建时间
print(create_time)
2021-10-18 16:00:42

21、判断字符串时间的合法性
import datetime
def verify_date_str_lawyer(datetime_str):
try:
datetime.datetime.strptime(datetime_str, '%Y-%m-%d %H:%M:%S')
return True
except ValueError:
return False

print(verify_date_str_lawyer('2003-12-23 23:59:59'))
print(verify_date_str_lawyer('2003-06-30 12:61:52'))

56、# python学习-将一串数字形式的时间转换为标准时间格式

import time
tupTime = time.localtime(1566366555)#秒时间戳
stadardTime = time.strftime("%Y-%m-%d %H:%M:%S", tupTime)
print(stadardTime)

2019-08-21 13:49:15

65、'2021-08-10'日期时间转为数字时间戳（https://www.cnblogs.com/jfl-xx/p/8024596.html）

字符类型的时间

tss1 = '2021-08-10 00:00:00'

转为时间数组

timeArray = time.strptime(tss1, "%Y-%m-%d %H:%M:%S")

转为时间戳

timeStamp = int(time.mktime(timeArray))
print(timeStamp) # 1628524800

69、当前日期时间
import datetime
a=str(datetime.datetime.now())[0:19]
print(a)

6、利用Python获取某个日期（形如xxxx-xx-xx）之前或之后多少天的日期：
import datetime

def get_day(date, step=0):
l = date.split("-")
y = int(l[0])
m = int(l[1])
d = int(l[2])
old_date = datetime.datetime(y, m, d)
new_date = (old_date + datetime.timedelta(days=step)).strftime('%Y-%m-%d')
print(new_date)
return new_date

20、日期转换
import datetime
a = '2018-10-03'
b = datetime.datetime.strptime(a, '%Y%m%d').strftime('%Y-%m-%d')

28、python获取当天日期

1. datetime.datetime.now().strftime('%Y%m%d')
2. today = datetime.date.today()

32、Python3 实例--Python 获取昨天日期
https://blog.csdn.net/qq_33410995/article/details/104294093

today = datetime.date.today()
oneday = datetime.timedelta(days=1)
yesterday = today - oneday

33、Python中GMT时间格式转化（https://blog.csdn.net/mz02230909mz/article/details/107776057）
https://blog.csdn.net/weixin_43919753/article/details/119349385

from datetime import datetime
GMT_FORMAT = ‘%a, %d %b %Y %H:%M:%S GMT+0800 (CST)’
print(datetime.utcnow().strftime(GMT_FORMAT))

output:
Mon, 12 Nov 2018 08:53:51 GMT+0800 (CST)

dd = “Fri Nov 09 2018 14:41:35 GMT+0800 (CST)”
GMT_FORMAT = ‘%a %b %d %Y %H:%M:%S GMT+0800 (CST)’
print(datetime.strptime(dd, GMT_FORMAT))

output:
2018-11-09 14:41:35

图片.png

34、将格式化字符串转换为时间戳（https://www.cnblogs.com/strivepy/p/10436213.html）
str_time = '2019-02-26 13:04:41'
print( time.mktime(time.strptime(str_time, '%Y-%m-%d %H:%M:%S')))

35、