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#3323: mention that if inheriting from a class without __slots__,

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the subclass will have a __dict__ available too.
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Georg Brandl 2008-07-19 13:09:42 +00:00
parent 59ec315b04
commit 3de1e69dc7
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Doc/reference/datamodel.rst
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@ -1600,6 +1600,10 @@ variable. Space is saved because *__dict__* is not created for each instance.
Notes on using *__slots__* Notes on using *__slots__*
* When inheriting from a class without *__slots__*, the *__dict__* attribute of
that class will always be accessible, so a *__slots__* definition in the
subclass is meaningless.
* Without a *__dict__* variable, instances cannot be assigned new variables not * Without a *__dict__* variable, instances cannot be assigned new variables not
listed in the *__slots__* definition. Attempts to assign to an unlisted listed in the *__slots__* definition. Attempts to assign to an unlisted
variable name raises :exc:`AttributeError`. If dynamic assignment of new variable name raises :exc:`AttributeError`. If dynamic assignment of new