Why are my two date fields not identical when copied?

I am using django and have two models with model.DateTimeField (). Sometimes I need a copy of the date - but look at this:

>>>myobject.date = datetime.datetime.now()
>>>print myobject.date
>>>2010-04-27 12:10:43.526277

>>>other_object.date_copy = myobject.date
>>>print other_object.date_copy
>>>2010-04-27 12:10:43

      

        
        
        
      

    

Why are these two dates not identical, and how can I make an exact copy of myobject.date?

Edit:

I made a mistake, simplifying the code I was using. The following code will reproduce the oddity:

>>>myobject.date = datetime.datetime.now()
>>>print myobject.date
>>>2010-04-27 12:10:43.526277
>>>myobject.save()
>>>myobject_retrieved_from_db = Myobject.objects.get(id=myobject.id) 

>>>other_object.date_copy = myobject_retrieved_from_db.date
>>>print other_object.date_copy
>>>2010-04-27 12:10:43

      

        
        
        
      

    

As Petriborg suggested, the time difference is caused by persisting the database:

>>>print myobject_retrieved_from_db.date
>>>2010-04-27 12:10:43

      

        
        
        
      

    

Mystery solved.