Catching errors in attribute names at assigment

[Pawel Kraszewski]

Heather Coppersmith wrote:

>> If you say __all__=["a","b","c"], those 3 attributes are the
>> only ones valid for field/method accessing. So class.a=5 is ok,
>> but class.d=5 raises exception.

> ITYM __slots__ instead of __all__.

My fault, __all__ is for module members, not class members.

Sorry for that.

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 Pawel Kraszewski                                FreeBSD/Linux

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