The formal term for that is intersection types. There is a long-standing
thread about that at https://github.com/python/typing/issues/213; there are
some uses but the feature would greatly complicate the type system, so it's
not clear that it's worth adding.
At this point, what Intersection needs
Rather than changing Protocols and affecting lots of users, it seems like was
you really want is a generic class that is the "and" to Union's "or"? e.g.
def foo(thing: All[Thread, SupportsStop]):
...
which seems reasonable. If that appeals to you, then you probably want to raise
that on
On Fri, 21 Apr 2023 at 22:57, Jordan Macdonald wrote:
> However, I then encountered an issue: I could define a Protocol that
> specified the 'stop()' method easily enough, but if I annotated the manager
> as taking that, it would accept any class which implemented a method named
> 'stop()',
