Date Addition

[heiro]

Hi,

how can I add calendar days in which it will exclude sundays?

ex: date today is MAY 1 then i will add 6 days, so it will return MAY 8 since sunday was excluded..

thanks guys....

[jlm699]

This is crude and done quick and dirty but here's an idea to get you started:
[code=python]
>>> import datetime
>>> dt = datetime.date(2 008, 5, 1)
>>> delta = 6
>>> if dt.weekday() > 7 - delta:
... delta += ( ( delta / 7 ) + [0, 1][bool(delta % 7)] )
...
>>> dt + datetime.timede lta(delta)
datetime.date(2 008, 5, 8)
>>> delta = 20
>>> if dt.weekday() > 7 - delta:
... delta += ( ( delta / 7 ) + [0, 1][bool(delta % 7)] )
...
>>> dt + datetime.timede lta(delta)
datetime.date(2 008, 5, 24)
>>> [/code]
That's not perfect but it's very close... only a minor modification to fix

[heiro]

This is crude and done quick and dirty but here's an idea to get you started:
[code=python]
>>> import datetime
>>> dt = datetime.date(2 008, 5, 1)
>>> delta = 6
>>> if dt.weekday() > 7 - delta:
... delta += ( ( delta / 7 ) + [0, 1][bool(delta % 7)] )
...
>>> dt + datetime.timede lta(delta)
datetime.date(2 008, 5, 8)
>>> delta = 20
>>> if dt.weekday() > 7 - delta:
... delta += ( ( delta / 7 ) + [0, 1][bool(delta % 7)] )
...
>>> dt + datetime.timede lta(delta)
datetime.date(2 008, 5, 24)
>>> [/code]
That's not perfect but it's very close... only a minor modification to fix

yeah much thanks for this.. i will do some modification..

[kaarthikeyapreyan]

Hey try this one !! hope this suits your requirement
I had a workaround with the time module

import time
import string ,sys

class workalday:
    
    def __init__(self):

        self.secperday=86400
        
    def addtime(self):
        """ Computations with epoch time working with dates after 1970"""
        
        print "Provide with date in format dd/mm/yyyy to compute Number of sundays till then "
        sys.stderr.write("Else provide with number of days for computation: ")
        self.uinput=raw_input()
        if '/' in self.uinput :
            self.fomats(1)
        else :
            print ("Computation for %s days from present date" %self.uinput)
            self.fomats(2)
            print ("Expected %d/%d/%d"%(self.lastdate,self.lastmonth,self.lastyear))

    def deadday(self,dd):
        """ Computation of sundays"""
        updatetime = 0
        sdays = int(dd)
        for i in range(sdays):
            updatetime = updatetime + self.secperday
            if time.localtime(self.presentsec + updatetime)[6] == 6:
                sdays = sdays + 1
        
        return sdays
        
    def fomats(self,state):
        
        """ Compute the sec and formated dates from actual to specified"""
        self.presentsec = time.time()
        self.pform= time.localtime()
        if state == 2 :
            """ If number of days specified"""
            sunday =  self.deadday(self.uinput)
            self.display(sunday)
            
        if state == 1 :
            """ If date computations specified to date"""
            frdate=string.split(self.uinput,'/')
            consdate = tuple([int(frdate[2]),int(frdate[1]),int(frdate[0]),self.pform[3],self.pform[4],self.pform[5],self.pform[6],self.pform[7],self.pform[8]])
            finsec = time.localtime(time.mktime(consdate))
            diffdays =  int(round((time.mktime(consdate) - self.presentsec ) / self.secperday))
            sunday =  self.deadday(diffdays)
            print ("The Number of sundays that will be excuded: %d" %sunday)
            
    def display(self,sdays):

        self.lastyear = time.localtime(self.presentsec + (sdays*self.secperday))[0]
        self.lastmonth  = time.localtime(self.presentsec + (sdays*self.secperday))[1]
        self.lastdate = time.localtime(self.presentsec + (sdays*self.secperday))[2]
        
if __name__=='__main__':
    
    obj = workalday()
    obj.addtime()