Which magic method method does hasattr call?

getattr(__o, name) can also be called as __o.__getattr__(name)

setattr(__o, name) can also be called as __o.__setattr__(name)

But what is the equivalent for hasattr?

I know the associated magic method for the in keyword is __contains__.

CodePudding user response：

There is no specific dunder method for hasattr(). It's essentially equivalent to:

def hasattr(object, name):
    try:
        getattr(object, name)
        return True
    except AttributeError:
        return False

So it's dependent on the same dunder methods used by getattr().

CodePudding user response：

The documentation for hasattr specifically states that

This is implemented by calling getattr(object, name) and seeing whether it raises an AttributeError or not.

That means that the __getattr__ and __getattribute__ are the dunders you are most concerned about.