#!/usr/bin/python
#_*_ coding:UTF-8_*_
import time
import datetime
import math
import calendar
'''
time.localtime得到的是元祖形式的时间struct_time
time.strftime 得到的是字符串类型的时间
'''
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 datetime1():
'''
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)
'''
datetime.timedelta(days=n)返回值为 2 days, 0:00:00
'''
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
calender.monthrange()计算每个月的天数,返回一个元祖(0,31),此为2018年1月,第一个参数代表当月第一天是星期几,第二个参数代表是这个月的天数
'''
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:
#将一位数的月份左补0变为两位数
mon ="0"+str(int(mon))
arr = (year,mon,days)
return "_".join("%s"%i for i in arr)
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_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_year_and_month(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:
#计算totalmon月的总天数
days = str(get_days_of_month(thisyear,totalmon))
#月份用0左补齐成两位数
totalmon = addzero(totalmon)
return year,totalmon,days
else:
# //取整除,返回商的整数部分,也就是一年
i = totalmon//12
# %取模:返回除法的余数
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 total <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 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) = get_year_and_month(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):
'''
get the first day of month from today
n is how many months
'''
(y,m,d)=get_year_and_month(n)
d ="01"
arr =(y,m,d)
return "_".join("%s"%i for i in arr)
def main():
print('today is:',today())
print('today is:',todaystr())
print('the date time is:',datetime1())
print('data time is:',datetimestr())
print('2 days after today is:',get_day_of_day(2))
print('2 days before today is ',get_day_of_day(-2))
print('2 months after today is:',get_today_month(2))
print('2 months before today is:',get_today_month(-2))
print('2 months after this month is:',get_firstday_month(2))
print('2 months after this month is:',get_firstday_month(-2))
#__name__ 是当前模块名,当模块被直接运行时模块名为__main__.当模块被直接运行时,以下代码块将被运行,当模块是被导入时,代码块不被运行
if __name__=="__main__":
main()