from warnings import deprecated
from typing import Protocol


class FooProtocol(Protocol):
    pass

class Base:
    pass

@deprecated("")
class DeprecatedBase:
    pass

class FooWithBase(Base, FooProtocol):
    pass

class FooWithDeprecatedBase(DeprecatedBase, FooProtocol):
    pass


assert FooWithBase._is_protocol is False
assert FooWithDeprecatedBase._is_protocol is True