>
> Thanks a lot.
> This solved the problem....
>
> Two questions:
>
> - why the brackets ??
>

Tables and fields can be accessed as properties via the usual "." notation, 
but also via keys like a dictionary. So,

db['tablename'] is equivalent to db.tablename and db.tablename['fieldname']is 
equivalent to 
db.tablename.fieldname.
 

>
> - is this the most "elegant" what to do this ??
>

Probably.

Anthony

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