파이썬 strftime, rrul 함수

strftime()

• datetime 객체를 문자열 형식으로 변환하는 함수.
• 형식 지정자를 사용하여 원하는 날짜/시간 형식으로 출력할 수 있음.

from datetime import datetime
now = datetime(2024, 3, 13)
print(now.strftime('%Y-%m-%d'))  # '2024-03-13'

rrul()

• dateutil.rrule에서 제공하는 함수로, 반복되는 날짜 규칙을 생성함.
• DAILY, WEEKLY, MONTHLY 등 다양한 반복 주기를 지정할 수 있음.

daily

from dateutil.rrule import rrule, DAILY
from datetime import datetime

start_date = datetime(2024, 2, 1)
end_date = datetime(2024, 2, 5)

for date in rrule(DAILY, dtstart=start_date, until=end_date):
    print(date.strftime('%Y-%m-%d'))

2024-02-01
2024-02-02
2024-02-03
2024-02-04
2024-02-05

 

weekly

from dateutil.rrule import rrule, WEEKLY
from datetime import datetime

start_date = datetime(2024, 2, 1)
end_date = datetime(2024, 2, 29)

for date in rrule(WEEKLY, dtstart=start_date, until=end_date):
    print(date.strftime('%Y-%m-%d'))

2024-02-01
2024-02-08
2024-02-15
2024-02-22
2024-02-29

 

monthly

 

from dateutil.rrule import rrule, MONTHLY
from datetime import datetime

start_date = datetime(2024, 2, 1)
end_date = datetime(2024, 4, 1)

for date in rrule(MONTHLY, dtstart=start_date, until=end_date):
    print(date.strftime('%Y-%m-%d'))

2024-02-01
2024-03-01
2024-04-01