class Foo:
method_type: type
def method(self) -> ???:
# code
# Example use:
class FooStr(Foo):
method_type = str
foo_str = FooStr().method() # should be str according to vscode's intellisense
class FooInt(Foo):
method_type = int
foo_int = FooInt().method() # similarly, this should be int
Note that simply replacing the ??? with method_type doesn't work as far as I've tested it.
How would I go about doing this?
A class attribute is a runtime value and Python doesn't really support types dependent on values. Python also doesn't have type members. So in conclusion, no this isn't possible. You'd need to use a generic
T = TypeVar("T")
class Foo(Generic[T]):
def method(self) -> T:
...
class FooStr(Foo[str]):
...
class FooInt(Foo[int]):
...
which is similar, if not quite the same.
If you want to know more about the difference, here's a discussion about it in Scala.
