python取當前時間前後一定間隔的時間點

 

當前時間

datetime.datetime.now() 

 

時間間隔

datetime.timedelta(參數=數值)  #參數：weeks，days，hours，minutes，seconds，microseconds，milliseconds

 

 

示例：

import datetime

nowtime = datetime.datetime.now()
print(nowtime) #當前時間

print(datetime.datetime.now() - datetime.timedelta(days=1)) #1天前 默認格式2019-02-11 13:27:16.231381
print(datetime.datetime.now() + datetime.timedelta(days=1)) #1天后

print((datetime.datetime.now() - datetime.timedelta(weeks=2)).strftime("%Y-%m-%d %H:%M:%S")) #兩週前
print((datetime.datetime.now() + datetime.timedelta(weeks=2)).strftime("%Y-%m-%d %H:%M:%S")) #兩週後

print((datetime.datetime.now() - datetime.timedelta(days=1)).strftime("%Y-%m-%d %H:%M:%S")) #1天前
print((datetime.datetime.now() + datetime.timedelta(days=1)).strftime("%Y-%m-%d %H:%M:%S"))#1天后

print((datetime.datetime.now() - datetime.timedelta(hours=2)).strftime("%Y-%m-%d %H:%M:%S")) #2小時前
print((datetime.datetime.now() + datetime.timedelta(hours=2)).strftime("%Y-%m-%d %H:%M:%S")) #2小時後

print((datetime.datetime.now() - datetime.timedelta(minutes=30)).strftime("%Y-%m-%d %H:%M:%S"))# 30分鐘前
print((datetime.datetime.now() + datetime.timedelta(minutes=30)).strftime("%Y-%m-%d %H:%M:%S")) #30分鐘後

print((datetime.datetime.now() - datetime.timedelta(seconds=10)).strftime("%Y-%m-%d %H:%M:%S")) #10秒前
print((datetime.datetime.now() + datetime.timedelta(seconds=10)).strftime("%Y-%m-%d %H:%M:%S")) #10秒後