How to do getattr with method

Question

How would I do the following:

instance.method()

I know I can do getattr(instance, method) to get instance.method, but is there a builtin to actually run that method?

Answer 1

Just do getattr(instance, method)(). getattr returns the method object, which you can call with () like any other callable.

Answer 2

All you need to do is add a () to the end:

getattr(instance,method)()

Answer 3

You can use operator.methodcaller to create a function that will run that method on the passed instance when executed. However you still have to actually call it on an instance.

from operator import methodcaller

call_hello = methodcaller('hello', 'Jack')

call_hello(something)   # same as something.hello('Jack')

This is useful when you want to call the same method, for which you don't know the name, on different instances.