Python Reflection – How to Call a Function of a Module Using Its Name

objectpythonreflection

How do I call a function, using a string with the function's name? For example:

import foo
func_name = "bar"
call(foo, func_name)  # calls foo.bar()

Given a module foo with method bar:

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

getattr can similarly be used on class instance bound methods, module-level methods, class methods... the list goes on.

You can use the getattr function:

import torchvision

model_name = 'resnet18'
model = getattr(torchvision.models, model_name)(pretrained=configs.use_trained_models)

This essentially is along the lines the same as the dot notation just in function form accepting a string to retrieve the attribute/method.