Python inheritance with generic object - how to call method only if it exists in that object [duplicate]

Question

So I have this piece of code:

class QuerySetUpdateOverriden(QuerySet, object):
    def update(self, *args, **kwargs):
        super().update(*args, **kwargs)
        if hasattr(self, method):
            self.method()
            return

I want to override the update method and if the second class that it inherits has a specific method, call that too.

But I get an error on the line containing the if statement saying "name method is not defined".

Why is this happening and how can I fix it?

Thanks.

What/where is method defined? If you're trying to get the name update programmatically, this may help. — sj95126
– sj95126, Commented Sep 18, 2022 at 14:55
The parameter for hasattr should be a string, because you don't pass variables to functions, you pass values. — Karl Knechtel
– Karl Knechtel, Commented Sep 18, 2022 at 15:33

willeM_ Van Onsem · Accepted Answer · 2022-09-18 15:01:01Z

1

you should pass a string with the name, so:

if hasattr(self, 'method'):
    self.method()
    return

answered Sep 18, 2022 at 15:01

willeM_ Van Onsem

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2 Comments

Abdul Aziz Barkat Over a year ago

Oh, I guess I misunderstood the question, but then isn't that just a typo? Or a duplicate of this: How to check whether a method exists in Python?

Octavian Niculescu Over a year ago

this was it. Sorry :(

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