On Thu, 19 Oct 2023 at 18:25, Karsten Hilbert <Karsten.Hilbert@gmx.net> wrote:

Fundamentally no, at least not without some shenanigans. Type hints do not affect the regular running of the code,

Except when they do ;-)

... depending on what counts as (valid) code ...

In Python a distinction can be made between "runnable" and "valid" :-D

Can you give a counter-example?

As per my recent foray into abusing existence-checking for Singleton assurance
along such lines as

try: self.initialized
except AttributeError: print('first instantiation'); self.initialized = True

and then changing that to

try: self.initialized:bool

But that's not equivalent code. You might just as well say that the
ellipsis here suddenly changes the code:

self.initialized
self.initialized = ...

These are completely different, and they behave differently. Both are
valid, but they mean different things.

ChrisA

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