How to invoke a function on an object dynamically by name?

Question

In Python, say I have a string that contains the name of a class function that I know a particular object will have, how can I invoke it?

That is:

obj = MyClass() # this class has a method doStuff()
func = "doStuff"
# how to call obj.doStuff() using the func variable?

Asked By: Roy Tang

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Answer 1

Use the getattr built-in function. See the documentation

obj = MyClass()
try:
    func = getattr(obj, "dostuff")
    func()
except AttributeError:
    print("dostuff not found")

Question: