[Tutor] Question about Classes

[Alan Gauld]

> By subclassing the class "Email", you are overwriting the
__init__ function
> in the Email class. This means that the instance of Contact has
no clue about
> the statement:
>
> self.emails = []
>
> in the Email class. You can try placing this statement in the
__init__ of
> Contact, or make it all one class, or whatever else you might
think of.

Or call the Email init function within the Contact init:

     Email.__init__(self)

This is normally good practice when creating subclasses anyhow.
Initialise the parent then do the local initialisation.

> > class Email:
> > def __init__(self):
> > self.emails=[]
> >
> >
> > class Contact(Email):
> > def __init__(self
> >              ,firstName=''
> >              ,lastName=''
> >              ):
> > """ Initial object """
       Email.__init__(self)

> >    self.firstName=firstName
> >    self.lastName=lastName
> >

Alan G.