Understanding the difference between __getattr__ and __getattribute__

I am trying to understand the difference between __getattr__ and __getattribute__, however, I am failing at it.

The answer to the Stack Overflow question Difference between __getattr__ vs __getattribute__ says:

__getattribute__ is invoked before looking at the actual attributes on
the object, and so can be tricky to
implement correctly. You can end up in
infinite recursions very easily.

I have absolutely no idea what that means.

Then it goes on to say:

You almost certainly want __getattr__.

Why?

I read that if __getattribute__ fails, __getattr__ is called. So why are there two different methods doing the same thing? If my code implements the new style classes, what should I use?

I am looking for some code examples to clear this question. I have Googled to best of my ability, but the answers that I found don’t discuss the problem thoroughly.

If there is any documentation, I am ready to read that.

4 Answers
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