A better way of making subsclassing of built-in types stick for attributes?

[Maric Michaud]

Le Mercredi 17 Mai 2006 06:17, telesphore4 at gmail.com a écrit :
> I want the fact that the fields are
> not strings to be invisible to the client programmers.
You should use properties then.

In [12]: class mystr(str) : pass
   ....:

In [13]: class myrow(object) :
   ....:         getX = lambda s : s._x
   ....:         setX = lambda s, v : setattr(s, '_x', mystr(v))
   ....:         X = property(getX, setX)
   ....:
   ....:

In [14]: r=myrow()

In [15]: r.X = 'toto'

In [16]: r.X
Out[16]: 'toto'

In [17]: type(r.X)
Out[17]: <class '__main__.mystr'>


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Maric Michaud
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