CODEWITHSUNDEEP
pythonpython-3.x
gornvix
gornvix

Reputation: 3382

How to call the second super method when using multiple inheritance?

class Foo1:
    def hi(self, name):
        print('Oh hi there %s.' % name)

class Foo2:
    def hi(self, name):
        print('Hi %s, how ya doing?' % name)

class Bar(Foo1, Foo2):
    def hi(self, name):
       super(Bar, self).hi(name)

bar = Bar()
bar.hi('John')

Outputs:

Oh hi there John.

How do you access Foo2's super method instead from Bar, other than just swapping the order of "Foo1, Foo2"?

Upvotes: 0

Views: 47

Answers (1)

ShadowRanger
ShadowRanger

Reputation: 155428

If you want to bypass the normal method resolution order, you're stuck with hacks. Either:

  1. Pretend to be the class just before the one you really want in the MRO:

    def hi(self, name):
    super(Foo1, self).hi(name)  # I'm really Bar's method, but lying to say I'm Foo1's

  2. Explicitly invoke the class you care about (manually passing self):

    def hi(self, name):
    Foo2.hi(self, name)  # Looking it up directly on the class I want

A note: If you're using Python 3 and want the normal MRO, you don't need to pass arguments to super() at all, this will invoke Foo1.hi just fine:

   def hi(self, name):
       super().hi(name)

Upvotes: 3

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