callable

Check whether an object can be called like a function.

Python 3.13
callable(object)

Parameters

objectAny: The object to check.

Return value

True or False.

Examples

A function and a number

Python 3.13
print(callable(len), callable(42))
True False

A class and an object with call

Python 3.13
class Greeter:
    def __call__(self, name):
        return f'Hi, {name}'


greeter = Greeter()
print(callable(Greeter), callable(greeter), greeter('Anna'))
True True Hi, Anna

Details

Classes are callable: calling a class creates an object. An instance is callable only if its class has a __call__ method. True does not guarantee that the call succeeds, for example with the wrong arguments.