#!/usr/bin/python

#-*- coding:UTF-8 -*-

import calendar

import datetime

import time

year = time.strftime("%Y", time.localtime())

mon = time.strftime("%m", time.localtime())

day = time.strftime("%d", time.localtime())

hour = time.strftime("%H", time.localtime())

min = time.strftime("%M", time.localtime())

sec = time.strftime("%S", time.localtime())

def today():

'''''

get today,date format="YYYY-MM-DD"

'''''

return datetime.date.today()

def todaystr():

'''

get date string, date format="YYYYMMDD"

'''

return year + mon + day

def date_time():

'''''

get datetime,format="YYYY-MM-DD HH:MM:SS"

'''

return time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())

def datetimestr():

'''''

get datetime string

date format="YYYYMMDDHHMMSS"

'''

return year + mon + day + hour + min + sec

def get_day_of_day(n=0):

'''''

if n>=0,date is larger than today

if n<0,date is less than today

date format = "YYYY-MM-DD"

'''

if n < 0:

n = abs(n)

return datetime.date.today() - datetime.timedelta(days=n)

else:

return datetime.date.today() + datetime.timedelta(days=n)

def get_days_of_month(year, mon):

'''''

get days of month

'''

return calendar.monthrange(year, mon)[1]

def get_firstday_of_month(year, mon):

'''''

get the first day of month

date format = "YYYY-MM-DD"

'''

days = "01"

if int(mon) < 10:

mon = "0" + str(int(mon))

arr = (year, mon, days)

return "-".join("%s" %i for i in arr)

def get_lastday_of_month(year, mon):

'''''

get the last day of month

date format = "YYYY-MM-DD"

'''

days=calendar.monthrange(year, mon)[1]

mon = addzero(mon)

arr = (year, mon, days)

return "-".join("%s" %i for i in arr)

def get_firstday_month(n=0):

'''''

get the first day of month from today

n is how many months

'''

(y, m, d) = getyearandmonth(n)

d = "01"

arr = (y, m, d)

return "-".join("%s" %i for i in arr)

def get_lastday_month(n=0):

'''''

get the last day of month from today

n is how many months

'''

return "-".join("%s" %i for i in getyearandmonth(n))

def getyearandmonth(n=0):

'''''

get the year,month,days from today

befor or after n months

'''

thisyear = int(year)

thismon = int(mon)

totalmon = thismon + n

if n >= 0:

if totalmon <= 12:

days = str(get_days_of_month(thisyear, totalmon))

totalmon = addzero(totalmon)

return year, totalmon, days

else:

i = totalmon//12

j = totalmon%12

if j == 0:

i -= 1

j = 12

thisyear += i

days = str(get_days_of_month(thisyear, j))

j = addzero(j)

return str(thisyear), str(j), days

else:

if totalmon > 0 and totalmon < 12:

days = str(get_days_of_month(thisyear,totalmon))

totalmon = addzero(totalmon)

return year, totalmon, days

else:

i = totalmon//12

j = totalmon%12

if(j==0):

i -= 1

j = 12

thisyear += i

days = str(get_days_of_month(thisyear, j))

j = addzero(j)

return str(thisyear), str(j), days

def addzero(n):

'''''

add 0 before 0-9

return 01-09

'''

nabs = abs(int(n))

if nabs < 10:

return "0" + str(nabs)

else:

return nabs

def get_today_month(n=0):

'''''

获取当前日期前后N月的日期

if n>0, 获取当前日期前N月的日期

if n<0, 获取当前日期后N月的日期

date format = "YYYY-MM-DD"

'''

(y, m, d) = getyearandmonth(n)

arr = (y, m, d)

if int(day) < int(d):

arr = (y, m, day)

return "-".join("%s" %i for i in arr)

def get_firstday_month(n=0):

(y, m, d) = getyearandmonth(n)

arr = (y, m, '01')

return "-".join("%s" %i for i in arr)

def main():

print(f'today is:{today()}')

print(f'today is:{todaystr()}')

print(f'the date time is:{date_time()}')

print(f'data time is:{datetimestr()}')

print(f'2 days after today is:{get_day_of_day(2)}')

print(f'2 days before today is:{get_day_of_day(-2)}')

print(f'2 months after today is:{get_today_month(2)}')

print(f'2 months before today is:{get_today_month(-2)}')

print(f'2 months after this month is:{get_firstday_month(2)}')

print(f'2 months before this month is:{get_firstday_month(-2)}')

if __name__=="__main__":

main()