Python Gets the date n days or n months before and after the current date

#-*-coding:utf-8-*-" "Gets the date of n days or n months before and after the current date" " fromTimeImportstrftime, LocalTime fromDatetimeImportTimedelta, DateImportCalendarYear= Strftime ("%Y", LocalTime ()) Mon= Strftime ("%m", LocalTime ()) Day= Strftime ("%d", LocalTime ()) hour= Strftime ("%H", LocalTime ()) min= Strftime ("%M", LocalTime ()) SEC= Strftime ("%s", LocalTime ())deftoday ():" "" get today,date format=" Yyyy-mm-dd "" '"    returnDate.today ()deftodaystr ():" "Get date string, date format= "YYYYMMDD"" "    returnyear+mon+ Daydefdatetime ():" "" get datetime,format=" Yyyy-mm-dd HH:MM:SS "" "    returnStrftime ("%y-%m-%d%h:%m:%s", LocalTime ())defdatetimestr ():" "' Get datetime string date format= ' Yyyymmddhhmmss '" "    returnyear+mon+day+hour+min+secdefGet_day_of_day (n=0):" "" if N>=0,date is larger than today if n<0,date are less than today date format =" Yyyy-mm-dd "" "    if(n<0): N=ABS (N)returnDate.today ()-timedelta (days=N)Else:        returnDate.today () +timedelta (days=N)defGet_days_of_month (Year,mon):" "' Get days of month '" "     returnCalendar.monthrange (year, Mon) [1]   defGet_firstday_of_month (Year,mon):" "' Get the first day of month date format = ' Yyyy-mm-dd '" " Days=" on"     if(int (Mon) <10): Mon="0"+str (int (Mon)) Arr=(year,mon,days)return "-". Join ("%s"%i forIincharr)defGet_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 forIincharr)defGet_firstday_month (n=0):" "' Get the first day of month from today N was how many months" "(y,m,d)=getyearandmonth (n) d=" on"arr=(y,m,d)return "-". Join ("%s"%i forIincharr)defGet_lastday_month (n=0):" ""Get the last day of this month from today N was how many months" "     return "-". Join ("%s"%i forIinchgetyearandmonth (n))defGetyearandmonth (n=0):" "' Get the year,month,days from today befor or after n months" "Thisyear=Int (year) Thismon=Int (Mon) Totalmon= thismon+Nif(n>=0):if(totalmon<=12): days=Str (get_days_of_month (Thisyear,totalmon)) Totalmon=Addzero (Totalmon)return(year,totalmon,days)Else: I= TOTALMON/12J= totalmon%12if(j==0): I-=1J=12Thisyear+=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/12J= totalmon%12if(j==0): I-=1J=12Thisyear+=I days=Str (get_days_of_month (THISYEAR,J)) J=Addzero (j)return(str (thisyear), str (j), days)defAddzero (n):" "' Add 0 before 0-9 return 01-09" "nabs=ABS (int (n))if(nabs<10):         return "0"+Str (nabs)Else:         returnnabsdefGet_today_month (n=0):" ""Gets the date of N-month before and after the current date if n>0, gets the date of the N-month before the current date if n<0, gets the date of the N-month after the current 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 forIincharr)if __name__=="__main__":    Printtoday ()Printtodaystr ()Printdatetime ()Printdatetimestr ()PrintGet_day_of_day (20)    PrintGet_day_of_day (-3)    PrintGet_today_month (-3)    PrintGet_today_month (3)

Python Gets the date n days or n months before and after the current date