Possibilities when trying to access an instance attribute?

Asked Aug 26 '17 at 16:27

Active Aug 26 '17 at 17:13

Viewed 38 times

I would like to find an exhaustive lookup operations made by the Python interpreter when trying to access an instance attribute or setting it to a new value.

I know several things about it by reading and experimenting:

When there is a property or a descriptor in the class body, it's used before anything
When there is the same attribute (with the same name I mean) in the __dict__ of the instance and the __dict__ of the class, the instance's one is used first
When the __gettatribute__ and the __getattr__ are both define in the class body, __gettatribute__ is used first since __getattr__ is only being called when the attribute isn't found elsewhere

But I was wondering about some limit cases... Can somebody give a explanation of all possibilities?

edited Aug 26 '17 at 17:13

asked Aug 26 '17 at 16:27

DevOps Craftsman

4

What's your *specific* question? – Klaus D. Aug 26 '17 at 16:37
If you search you should find explanations, here and elsewhere. – wwii Aug 26 '17 at 16:46
1

Have you read the [Descriptor HowTo Guide](https://docs.python.org/3.6/howto/descriptor.html)? – wwii Aug 26 '17 at 16:55

Possibilities when trying to access an instance attribute?

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