CallableDict

A dictionary that can be called like a function.

This class extends the built-in dict class and adds a call method, which allows it to be used as a callable object. This is particularly useful for making the result of build_preprocessor callable, so users can do preprocessor(test_input) instead of preprocessor"model".

When called, it will try to invoke the "model" key if it exists, passing all arguments and keyword arguments to that function.