[Python] dateutil 모듈을 이용한 전년,전월,전일,D-day 날짜 구하기

 

파이썬 dateutil 모듈을 활용한 전년,전월,전일, D-day  구하기

 

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2019-10-21 기준

 

 

 

전년:동월:동일

 

from datetime import datetime
from dateutil.relativedelta import *

now = datetime.now().date()
print(now+relativedelta(years=-1))

-------------------------------------

2018-10-21

 

 

동년:전월:동일

 

from datetime import datetime
from dateutil.relativedelta import *

now = datetime.now().date()
print(now+relativedelta(months=-1))

--------------------------------------

2019-09-21

 

 

동년:전월:전일

 

from datetime import datetime
from dateutil.relativedelta import *

now = datetime.now().date()
print(now+relativedelta(days=-1))

--------------------------------------

2019-10-20

 

 

 

특정일로 부터 얼마나 시간이 흘렀는지

 

from datetime import datetime
from dateutil.relativedelta import *

now = datetime.now()
year, month, day = 1981, 1, 1
day = relativedelta(now, datetime(year, month, day))
print('%s years, %s months, %s days' %(day.years, day.months, day.days))

-------------------------------------------------------------------------

38 years, 9 months, 20 days

 

 

특정일로 부터 얼마나 시간이 남았는지 (D-Day 계산기)

 

from datetime import datetime
from dateutil.relativedelta import *

now = datetime.now()
year, month, day = 2019, 11, 1
day = relativedelta(now, datetime(year, month, day))
print('%s years, %s months, %s days' %(day.years, day.months, day.days))

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0 years, 0 months, -10 days