__call__

Dunder MethodPython 2.0+Advanced

Makes an instance callable like a function (obj())

Quick Info

Documentation
Official Docs
Python Version
2.0+

Learn by Difficulty

Easy2 examples
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Intermediate2 examples
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Advanced1 example
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Expert1 example
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Quick Example

python
class Multiplier:
    def __init__(self, factor):
        self.factor = factor

    def __call__(self, value):
        return value * self.factor

double = Multiplier(2)
triple = Multiplier(3)
print(double(5))
print(triple(5))

__call__ makes an instance callable like a function (obj()). Implementing it lets you customize how Python interacts with your objects.

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Tags

oopmagic-methodprotocolcore