python計算時間 （差,排序,相加）

python計算時間差是需要引入時間包的而且不能使用字串之間相減

例如：

t1 = "2020-11-05 09:49:32"

t2 = "2020-11-05 21:03:54"
t3 = t2 -t1

算了之間上**了；

import datetime

def test():
t1 = "2020-11-05 09:49:32"
t2 = "2020-11-05 21:03:54"
t1 = datetime.datetime.strptime(t1,'%y-%m-%d %h:%m:%s')
t2 = datetime.datetime.strptime(t2,'%y-%m-%d %h:%m:%s')
t3 = (t2 -t1).seconds
print(t3)
test()

想要轉換成分鐘除以60就可以了，轉換成小時除3600

想轉換成天可以

t3 = (t2 -t1).days

t1 = "2020-11-05 09:49:32"

t2 = "2020-11-05 21:03:54"
t3 = "2020-11-06 09:03:54"
t1 = datetime.datetime.strptime(t1,'%y-%m-%d %h:%m:%s')
t2 = datetime.datetime.strptime(t2,'%y-%m-%d %h:%m:%s')
t3 = datetime.datetime.strptime(t3,'%y-%m-%d %h:%m:%s')
t = (t2 -t1).seconds
tlist = 
tlist.sort(reverse = false)
print(tlist)
print(tlist[1])
print((tlist[len(tlist) -1] - tlist[0]).seconds)

tlist.sort(reverse = false)

reverse = false#是降序
reverse = true #是公升序

tqw = tlist[0] + datetime.timedelta(minutes=15)

2020-11-05 10:04:32

print (datetime.datetime.now()+datetime.timedelta(days=1)).strftime("%y-%m-%d %h:%m:%s")

print (datetime.datetime.now()+datetime.timedelta(days=-1)).strftime("%y-%m-%d %h:%m:%s")

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