ricree ricree - 1 month ago 10
Python Question

Calling a function of a module from a string with the function's name in Python

What is the best way to go about calling a function given a string with the function's name in a Python program. For example, let's say that I have a module

foo
, and I have a string whose contents are
"bar"
. What is the best way to go about calling
foo.bar()
?

I need to get the return value of the function, which is why I don't just use
eval
. I figured out how to do it by using
eval
to define a temp function that returns the result of that function call, but I'm hoping that there is a more elegant way to do this.

Answer

Assuming module foo with method bar:

import foo
methodToCall = getattr(foo, 'bar')
result = methodToCall()

As far as that goes, lines 2 and 3 can be compressed to:

result = getattr(foo, 'bar')()

if that makes more sense for your use case. You can use getattr in this fashion on class instance bound methods, module-level methods, class methods... the list goes on.