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

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](https://stackoverflow.com/questions/63066627/how-to-get-a-method-name-in-python). — sj95126, Sep 18 '22 at 14:55
The parameter for `hasattr` should be a string, because you don't pass variables to functions, you pass **values**. — Karl Knechtel, Sep 18 '22 at 15:33

score 1 · Accepted Answer · answered Sep 18 '22 at 15:01

1

you should pass a string with the name, so:

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

answered Sep 18 '22 at 15:01

Willem Van Onsem

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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?](https://stackoverflow.com/questions/7580532/how-to-check-whether-a-method-exists-in-python) – Abdul Aziz Barkat Sep 18 '22 at 15:07
1

this was it. Sorry :( – Octavian Niculescu Sep 18 '22 at 15:11

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

1 Answers1