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Python/날짜 관련 datetime



1. Today #

from datetime import datetime
date = f"{datetime.now():%Y-%m-%d}" # today
 
2018-11-03

2. 문자열로부터 datetime 입력 #

from datetime import datetime, timedelta
t1 = "2017-11-11T08:59:00"
 t2 = "2017-11-10T08:59:00"
dt1 = datetime.strptime(t1, '%Y-%m-%dT%H:%M:%S')
 dt2 = datetime.strptime(t2, '%Y-%m-%dT%H:%M:%S')
print (dt1)
 print (dt2)
 
2017-11-11T08:59:00
2017-11-10T08:59:00

3. datetime to timestamp #

import time
 from datetime import datetime, timedelta
dt1 = datetime.strptime("2017-11-11T08:59:00", '%Y-%m-%dT%H:%M:%S')
 dt2 = datetime.strptime("2017-11-10T08:59:00", '%Y-%m-%dT%H:%M:%S')
timestamp1 = time.mktime(dt1.timetuple())
 timestamp2 = time.mktime(dt2.timetuple())
 print (timestamp1)
 print (timestamp2)
 
1510358340.0
1510271940.0

4. 시간 더하고 빼기 timedelta #

from datetime import datetime, timedelta
yesterday = datetime.now() - timedelta(days=1)
print (datetime.now())
 print (yesterday)
 
2018-11-03 12:57:10.385943
2018-11-02 12:57:10.385943

5. Epoch & Unix Timestamp Conversion #

from datetime import datetime
timestamp1 = 1541217027247 # milliseconds Timestamp
 dt = datetime.utcfromtimestamp(timestamp1 / 1000.) # GMT
 date = f"{dt:%Y-%m-%d %H:%M:%S}"
timestamp2 = 1528797322 # Unix epoch time
 dt = datetime.fromtimestamp(timestamp2) # System Timezone
 date = f"{dt:%Y-%m-%d %H:%M:%S}"
 
2018-11-03 12:51:30
2018-06-12 18:55:22

6. Get an UTC #

import pytz
 from datetime import datetime, timedelta
print (datetime.now(pytz.utc).strftime("%Y-%m-%d %H:%M:%S"))
 
2018-11-03 03:51:30

7. timedelta 크기 비교 #

s1 = "2018-06-1911:30"
 s2 = "2018-06-1911:24"
tm1 = datetime.strptime(s1, '%Y-%m-%d%H:%M')
 tm2 = datetime.strptime(s2, '%Y-%m-%d%H:%M')
 delta = tm1 - tm2
print (delta < timedelta(minutes=5))
 print (delta < timedelta(minutes=7))
 
False
True
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Last updated: 2022-02-02 14:26 Created: 2018-11-03