在Python中添加5天的日期

时间:2011-07-29 09:17:19

标签: python date datetime

我有一个约会"10/10/11(m-d-y)",我希望使用Python脚本添加5天。请考虑一个适用于月末的一般解决方案。

我正在使用以下代码:

import re
from datetime import datetime

StartDate = "10/10/11"

Date = datetime.strptime(StartDate, "%m/%d/%y")

print Date - >正在打印'2011-10-10 00:00:00'

现在我想在这个日期添加5天。我使用了以下代码:

EndDate = Date.today()+timedelta(days=10)

返回了此错误:

name 'timedelta' is not defined

15 个答案:

答案 0 :(得分:441)

以前的答案是正确的,但这通常是更好的做法:

import datetime

然后你将使用datetime.timedelta

date_1 = datetime.datetime.strptime(start_date, "%m/%d/%y")

end_date = date_1 + datetime.timedelta(days=10)

答案 1 :(得分:98)

首先导入timedelta

from datetime import timedelta

Date.today()将返回今天的日期时间,可能是您想要的

EndDate = Date + timedelta(days=10)

答案 2 :(得分:15)

如果你碰巧已经在使用pandas,你可以通过不指定格式来节省一点空间:

import pandas as pd
startdate = "10/10/2011"
enddate = pd.to_datetime(startdate) + pd.DateOffset(days=5)

答案 3 :(得分:12)

我猜你错过了这样的事情:

from datetime import timedelta

答案 4 :(得分:11)

以下是使用 dateutil的relativedelta 添加日期的另一种方法。

from datetime import datetime
from dateutil.relativedelta import relativedelta

print 'Today: ',datetime.now().strftime('%d/%m/%Y %H:%M:%S') 
date_after_month = datetime.now()+ relativedelta(days=5)
print 'After 5 Days:', date_after_month.strftime('%d/%m/%Y %H:%M:%S')

输出:

  

今天:25/06/2015 15:56:09

     

5天后:2015年6月30日15:56:09

答案 5 :(得分:8)

这是从现在开始+指定日期的功能

import datetime

def get_date(dateFormat="%d-%m-%Y", addDays=0):

    timeNow = datetime.datetime.now()
    if (addDays!=0):
        anotherTime = timeNow + datetime.timedelta(days=addDays)
    else:
        anotherTime = timeNow

    return anotherTime.strftime(dateFormat)

用法:

addDays = 3 #days
output_format = '%d-%m-%Y'
output = get_date(output_format, addDays)
print output

答案 6 :(得分:7)

如果您想现在添加日期,可以使用此代码

from datetime import datetime
from datetime import timedelta


date_now_more_5_days = (datetime.now() + timedelta(days=5) ).strftime('%Y-%m-%d')

答案 7 :(得分:5)

为了拥有更简洁的代码,并避免在datetime和datetime.datetime 之间名称冲突 ,您应该重命名这些类使用 CamelCase 名称。

from datetime import datetime as DateTime, timedelta as TimeDelta

所以你可以做以下事情,我认为它更清楚。

date_1 = DateTime.today() 
end_date = date_1 + TimeDelta(days=10)

此外,如果您希望稍后import datetime,也会有无名称冲突

答案 8 :(得分:0)

使用timedelta,您可以执行以下操作:

import datetime
today=datetime.date.today()


time=datetime.time()
print("today :",today)

# One day different .
five_day=datetime.timedelta(days=5)
print("one day :",five_day)
#output - 1 day , 00:00:00


# five day extend .
fitfthday=today+five_day
print("fitfthday",fitfthday)


# five day extend .
fitfthday=today+five_day
print("fitfthday",fitfthday)
#output - 
today : 2019-05-29
one day : 5 days, 0:00:00
fitfthday 2019-06-03

答案 9 :(得分:0)

通常,您现在没有答案,但是也许我创建的我的课程也会有所帮助。对我来说,它可以解决我在Pyhon项目中曾经遇到的所有要求。

class GetDate:
    def __init__(self, date, format="%Y-%m-%d"):
        self.tz = pytz.timezone("Europe/Warsaw")

        if isinstance(date, str):
            date = datetime.strptime(date, format)

        self.date = date.astimezone(self.tz)

    def time_delta_days(self, days):
        return self.date + timedelta(days=days)

    def time_delta_hours(self, hours):
        return self.date + timedelta(hours=hours)

    def time_delta_seconds(self, seconds):
        return self.date + timedelta(seconds=seconds)

    def get_minimum_time(self):
        return datetime.combine(self.date, time.min).astimezone(self.tz)

    def get_maximum_time(self):
        return datetime.combine(self.date, time.max).astimezone(self.tz)

    def get_month_first_day(self):
        return datetime(self.date.year, self.date.month, 1).astimezone(self.tz)

    def current(self):
        return self.date

    def get_month_last_day(self):
        lastDay = calendar.monthrange(self.date.year, self.date.month)[1]
        date = datetime(self.date.year, self.date.month, lastDay)
        return datetime.combine(date, time.max).astimezone(self.tz)

使用方法

  1. self.tz = pytz.timezone("Europe/Warsaw")-在这里定义要在项目中使用的时区
  2. GetDate("2019-08-08").current()-这会将您的字符串日期转换为具有您在pt 1中定义的时区的时间感知对象。默认字符串格式为format="%Y-%m-%d",但可以随时进行更改。 (例如GetDate("2019-08-08 08:45", format="%Y-%m-%d %H:%M").current()
  3. GetDate("2019-08-08").get_month_first_day()返回给定日期(字符串或对象)月份的第一天
  4. GetDate("2019-08-08").get_month_last_day()返回上个月的给定日期
  5. GetDate("2019-08-08").minimum_time()返回给定日期的开始日期
  6. GetDate("2019-08-08").maximum_time()返回给定日期的一天
  7. GetDate("2019-08-08").time_delta_days({number_of_days})返回给定日期+添加{天数}(您也可以致电:GetDate(timezone.now()).time_delta_days(-1)代表昨天)
  8. GetDate("2019-08-08").time_delta_haours({number_of_hours})与pt 7类似,但需要几个小时才能工作
  9. GetDate("2019-08-08").time_delta_seconds({number_of_seconds})与pt 7类似,但工作时间为几秒钟

答案 10 :(得分:0)

有时候,我们需要使用“从&日期到”的搜索。如果我们使用date__range,那么我们需要添加1天和to_date,否则queryset将为空。

示例:

从日期时间导入timedelta

from_date = parse_date(request.POST ['from_date'])

to_date = parse_date(request.POST ['to_date'])+ timedelta(days = 1)

attendance_list = models.DailyAttendance.objects.filter(attdate__range = [from_date,to_date])

答案 11 :(得分:0)

此功能可能会有所帮助 导入时间增量丢失

John Doe

答案 12 :(得分:0)

我已经看到了一个 Pandas 示例,但这里有一个转折,您可以直接导入 Day 类

from pandas.tseries.offsets import Day

date1 = datetime(2011, 10, 10)
date2 = date1 + 5 * Day()

答案 13 :(得分:0)

试试这个:

将当前日期增加 5 天。

from datetime import datetime, timedelta

current_date = datetime.now()
end_date = current_date + timedelta(days=5) # Adding 5 days.
end_date_formatted = end_date.strftime('%Y-%m-%d')
print(end_date_formatted)

从当前日期减去 5 天。

from datetime import datetime, timedelta

current_date = datetime.now()
end_date = current_date + timedelta(days=-5) # Subtracting 5 days.
end_date_formatted = end_date.strftime('%Y-%m-%d')
print(end_date_formatted)

答案 14 :(得分:0)

class myDate:

    def __init__(self):
        self.day = 0
        self.month = 0
        self.year = 0
        ## for checking valid days month and year
        while (True):
            d = int(input("Enter The day :- "))
            if (d > 31):
                print("Plz 1 To 30 value Enter ........")
            else:
                self.day = d
                break

        while (True):
            m = int(input("Enter The Month :- "))
            if (m > 13):
                print("Plz 1 To 12 value Enter ........")
            else:
                self.month = m
                break

        while (True):
            y = int(input("Enter The Year :- "))
            if (y > 9999 and y < 0000):
                print("Plz 0000 To 9999 value Enter ........")
            else:
                self.year = y
                break
    ## method for aday ands cnttract days
    def adayDays(self, n):
        ## aday days to date day
        nd = self.day + n
        print(nd)
        ## check days subtract from date
        if nd == 0: ## check if days are 7  subtracted from 7 then,........
            if(self.year % 4 == 0):
                if(self.month == 3):
                    self.day = 29
                    self.month -= 1
                    self.year = self. year
            else:
                if(self.month == 3):
                    self.day = 28
                    self.month -= 1
                    self.year = self. year
            if  (self.month == 5) or (self.month == 7) or (self.month == 8) or (self.month == 10) or (self.month == 12):
                self.day = 30
                self.month -= 1
                self.year = self. year
                   
            elif (self.month == 2) or (self.month == 4) or (self.month == 6) or (self.month == 9) or (self.month == 11):
                self.day = 31
                self.month -= 1
                self.year = self. year

            elif(self.month == 1):
                self.month = 12
                self.year -= 1    
        ## nd == 0 if condition over
        ## after subtract days to day io goes into negative then
        elif nd < 0 :   
            n = abs(n)## return positive if no is negative
            for i in range (n,0,-1): ## 
                
                if self.day == 0:

                    if self.month == 1:
                        self.day = 30
                        
                        self.month = 12
                        self.year -= 1
                    else:
                        self.month -= 1
                        if(self.month == 1) or (self.month == 3)or (self.month == 5) or (self.month == 7) or (self.month == 8) or (self.month == 10) or (self.month ==12):
                            self.day = 30
                        elif(self.month == 4)or (self.month == 6) or (self.month == 9) or (self.month == 11):
                            self.day = 29
                        elif(self.month == 2):
                            if(self.year % 4 == 0):
                                self.day == 28
                            else:
                                self.day == 27
                else:
                    self.day -= 1

        ## enf of elif negative days
        ## adaying days to DATE
        else:
            cnt = 0
            while (True):

                if self.month == 2:  # check leap year
                    
                    if(self.year % 4 == 0):
                        if(nd > 29):
                            cnt = nd - 29
                            nd = cnt
                            self.month += 1
                        else:
                            self.day = nd
                            break
                ## if not leap year then
                    else:  
                    
                        if(nd > 28):
                            cnt = nd - 28
                            nd = cnt
                            self.month += 1
                        else:
                            self.day = nd
                            break
                ## checking month other than february month
                elif(self.month == 1) or (self.month == 3) or (self.month == 5) or (self.month == 7) or (self.month == 8) or (self.month == 10) or (self.month == 12):
                    if(nd > 31):
                        cnt = nd - 31
                        nd = cnt

                        if(self.month == 12):
                            self.month = 1
                            self.year += 1
                        else:
                            self.month += 1
                    else:
                        self.day = nd
                        break

                elif(self.month == 4) or (self.month == 6) or (self.month == 9) or (self.month == 11):
                    if(nd > 30):
                        cnt = nd - 30
                        nd = cnt
                        self.month += 1

                    else:
                        self.day = nd
                        break
                ## end of month condition
        ## end of while loop
    ## end of else condition for adaying days
    def formatDate(self,frmt):

        if(frmt == 1):
            ff=str(self.day)+"-"+str(self.month)+"-"+str(self.year)
        elif(frmt == 2):
            ff=str(self.month)+"-"+str(self.day)+"-"+str(self.year)
        elif(frmt == 3):
            ff =str(self.year),"-",str(self.month),"-",str(self.day)
        elif(frmt == 0):
            print("Thanky You.....................")
            
        else:
            print("Enter Correct Choice.......")
        print(ff)
            
            

dt = myDate()
nday = int(input("Enter No. For Aday or SUBTRACT Days :: "))
dt.adayDays(nday)
print("1 : day-month-year")
print("2 : month-day-year")
print("3 : year-month-day")
print("0 : EXIT")
frmt = int (input("Enter Your Choice :: "))
dt.formatDate(frmt)