[Tutor] class data

[fleet@teachout.org]

Everything went fine until -

>>> for e in book:
...    e.saveme('book.txt')
...
Traceback (innermost last):
  File "<stdin>", line 2, in ?
  File "<stdin>", line 8, in saveme
TypeError: read-only buffer, tuple

				- fleet -

On Mon, 3 Dec 2001 alan.gauld@bt.com wrote:

> I'll have a go at what I think is confusing you...
>
> class Entry:
>    def __init__(s, nm,ph,em):
>       s.name = nm
>       s.phone = ph
>       s.email = em
>    def saveme(s,flnm):
>       f = open(flnm,'a')
>       f.write(`s.name`,'\t',`s.phone`,'\t',s.email`)
>
> # We now have a class container which holds two methods
>
> book = []
> for i in range(10):
>    book.append(Entry('al','1234','ag.co.com')
>
> # we now have 10 instances stored in a standard list container
>
> for e in book:
>    e.saveme('book.txt')
>
> # we now save the instance data from all 10 instances
>
> Does that help?
>
> Alan g.
>
>