利用python获取当前日期前后N天或N月日期的方法示例

yipeiwu_com6年前Python基础

前言

最近因为工作原因,发现一个Python的时间组件,很好用分享出来!(忘记作者名字了,在这里先感谢了),下面话不多说,来一起看看详细的介绍吧。

示例代码:

# -*- coding: utf-8 -*-

'''获取当前日期前后N天或N月的日期'''

from time import strftime, localtime
from datetime import timedelta, date
import calendar

year = strftime("%Y", localtime())
mon = strftime("%m", localtime())
day = strftime("%d", localtime())
hour = strftime("%H", localtime())
min = strftime("%M", localtime())
sec = strftime("%S", localtime())

def today():
 '''''
 get today,date format="YYYY-MM-DD"
 '''''
 return date.today()


def todaystr():
 '''
 get date string, date format="YYYYMMDD"
 '''
 return year + mon + day


def datetime():
 '''''
 get datetime,format="YYYY-MM-DD HH:MM:SS"
 '''
 return strftime("%Y-%m-%d %H:%M:%S", 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 date.today() - timedelta(days=n)
 else:
  return date.today() + 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)


if __name__ == "__main__":
 print today()
 print todaystr()
 print datetime()
 print datetimestr()
 print get_day_of_day(20)
 print get_day_of_day(-3)
 print get_today_month(-3)
 print get_today_month(3)
 print get_today_month(19)

总结

以上就是这篇文章的全部内容了,希望本文的内容对大家的学习或者工作能带来一定的帮助,如果有疑问大家可以留言交流,谢谢大家对【听图阁-专注于Python设计】的支持

相关文章

Django中反向生成models.py的实例讲解

命令行中进入Django项目目录,执行 python manage.py inspectdb testmodel_test 其中testmodel_test为数据表,生成的结果...

Python之csv文件从MySQL数据库导入导出的方法

Python从MySQL数据库中导出csv文件处理 csv文件导入MySQL数据库 import pymysql import csv import codecs def get_c...

Python实现的Google IP 可用性检测脚本

需要 Python 3.4+,一个参数用来选择测试搜索服务还是 GAE 服务。测试 GAE 服务的话需要先修改开头的两个变量。从标准输入读取 IP 地址或者 IP 段(形如 192.16...

Python中装饰器高级用法详解

在Python中,装饰器一般用来修饰函数,实现公共功能,达到代码复用的目的。在函数定义前加上@xxxx,然后函数就注入了某些行为,很神奇!然而,这只是语法糖而已。 场景 假设,有一些工作...

python 基于TCP协议的套接字编程详解

基于TCP协议的套接字编程 实现电话沟通为例,这里传递的是字符,可以自己尝试去发送一个文件 # 服务端 import socket # 1. 符合TCP协议的手机 server =...