날짜 다루기

[날짜 다루기]

from math import exp, log, sqrt

import re

from datetime import date, time, datetime, timedelta

today = date.today()

print("Output #41: today:{0!s}".format(today))

print("Output #42: year:{0!s}".format(today.year))

print("Output #43: month:{0!s}".format(today.month))

print("Output #44: day:{0!s}".format(today.day))

current_datetime = datetime.today()

print("Output #45: datetime:{0!s}".format(current_datetime))

Output #41: today:2018-02-07
Output #42: year:2018
Output #43: month:2
Output #44: day:7
Output #45: day:2018-02-07 08:16:54.543714

#timedelta 함수로 새로운 날짜 만들기

one_day = timedelta(days=-1)

yesterday = today + one_day

print("Output #46: yesterday:{0!s}".format(yesterday))

eight_hours = timedelta(hours=-8)

print("Output #47: eight hours:{0!s} {1!s}".format(eight_hours.days, eight_hours.seconds))

Output #46: yesterday:2018-02-06
Output #47: eight hours:-1 57600

#두 날짜 사이의 차이 계산

date_diff = today - yesterday

print("Output #48: diff:{0!s}".format(date_diff))

print("Output #49: diff:{0!s}".format(str(date_diff).split()[0]))

Output #48: diff:1 day, 0:00:00
Output #49: diff:1

# strftime함수로 date 객체를 특적 문자열로 만들기

print("Output #50: {0!s}".format(today.strftime('%m/%d/%Y')))

print("Output #51: {0!s}".format(today.strftime('%b %d, %Y')))

print("Output #52: {0!s}".format(today.strftime('%Y-%m-%d')))

print("Output #53: {0!s}".format(today.strftime('%B %d, %Y')))

Output #50: 02/07/2018
Output #51: Feb 07, 2018
Output #52: 2018-02-07
Output #53: February 07, 2018

date1 = today.strftime('%m/%d/%Y')

date2 = today.strftime('%b %d, %Y')

date3 = today.strftime('%Y-%m-%d')

date4 = today.strftime('%B %d, %Y')

print("Output #54: {0!s}".format(datetime.strptime(date1, '%m/%d/%Y')))

print("Output #55: {0!s}".format(datetime.strptime(date2, '%b %d, %Y')))

print("Output #56: {0!s}".format(datetime.date(datetime.strptime(date3, '%Y-%m-%d'))))

print("Output #57: {0!s}".format(datetime.date(datetime.strptime(date4, '%B %d, %Y'))))

Output #54: 2018-02-07 00:00:00
Output #55: 2018-02-07 00:00:00
Output #56: 2018-02-07
Output #57: 2018-02-07