>A Python instance is effectively a dictionary. The contents of that dictionary can be mutated at runtime to disagree with the type that is specified. This is p

>A Python instance is effectively a dictionary. The contents of that dictionary can be mutated at runtime to disagree with the type that is specified. This is perhaps an antipattern but it’s not uncommon. Yes I know. but the you will see the code addresses this. Mypy caught the monkey patching. Look at it. I added a property to an instance dynamically and mypy caught it. >You may say “oh but that’s uncommon or bad practice” but it’s unfortunately quite common in many production systems because Python has encouraged embracing its dynamicism for decades. That’s not a flaw, that’s a power. But it definitely has its pros and cons. I addressed this in the post you replied to. I specifically stated it. Let me quote it: "__getattr__ is type checked too as long as you type the method signature, I have seen some weirdness around this area for type checkers but that's not the main problem. I understand where you are getting at with __getattr__. When you use this you're essentially creating something akin to a function with a string as a parameter. The contents of a string can't be type checked and if all methods are defined this way on a class none of it can be checked." You addressed a point I already addressed, and didn't address the points you were factually wrong about: Dictionary access is type checked. Monkey patching is also type checked. >Anyway I shall not respond further to you because this discussion is hyper fixating on something that was only intended to be an example. It serves no purpose to continue arguing Completely agreed let's move on from all the BS. But you said some things that were factually wrong about python Dicts not being type checked. You said dictionary access is not type checked. Please address those things. I am interested in your viewpoint on this matter because I can learn something if my statement is wrong.