详解python中StringAndDate的用法

''''' 
Created on 2013-7-25 
 
@author: Administrator 
''' 
from datetime import datetime 
class StringAndDate(object): 
   
  ''''' String to Date(datetime) or date to string ''' 
   
  def stringToDate(self,string): 
    #example '2013-07-22 09:44:15+00:00' 
    dt = datetime.strptime(string, "%Y-%m-%d %H:%M:%S+00:00") 
    #print dt 
    return dt 
   
  ''''' Date(datetime) to String ''' 
   
  def dateToString(self,date): 
    ds = date.strftime('%Y-%m-%d %H:%M:%S') 
    return ds 
   
  ''''' return n hours after datetime ''' 
   
  def getAfterDate(self,n): 
    dnow = datetime.datetime.now() 
    dafter = dnow + datetime.timedelta(hours=n) 
    #dafter.ctime() 
    return dafter