python datetime / date

from datetime import datetime, timedelta
import pytz

# 현재 시간
now = datetime.now()
print(now)

# 시간 지정 생성
set_datetime = datetime.strptime('2019-12-31 00:00:00', '%Y-%m-%d %H:%M:%S')
print(set_datetime)

 

# datetime to date

set_date = datetime.strptime('2019-12-31 00:00:00', '%Y-%m-%d %H:%M:%S').date()

print(set_date)

 

# 정각으로 설정하기

datetime.combine(now, datetime.min.time())

# 시간 더하기 뺴기
before = now - timedelta(hours=7)
after = now + timedelta(hours=7)
print(before, after)

# UTC time
dt = datetime.utcnow()
print(dt)

# iso8601
# Timezone을 설정
local_timezone = pytz.timezone('Asia/Seoul')
local_date = now.replace(tzinfo=pytz.utc).astimezone(local_timezone)
print(local_date)

# iso8601 밀리세컨드 제거
local_date = now.replace(tzinfo=pytz.utc).astimezone(local_timezone).replace(microsecond=0)
print(local_date)

# timezone
tz = local_date.tzinfo
print(tz)

# datetime to str
nowDatetime = now.strftime('%Y-%m-%d %H:%M:%S')
print(nowDatetime, type(nowDatetime))

# datetime to timestamp
timestamp = now.strftime('%s')
print(timestamp)

# timestamp to datetime
now_datetime = datetime.utcfromtimestamp(int(timestamp)).strftime('%Y-%m-%d %H:%M:%S')
print(now_datetime)