Attempting to grok data descriptor contributions to Python annotations.

mcve.py

#!/usr/bin/env python3

from dataclasses import dataclass


class String:
        def __get__(self, obj, cls=None) -> str:
                return "I'm a string!"


class Sample:
        stringy: str = String()


class Example:
        stringy = String()


@dataclass
class Dataclass:
        stringy: str = String()


if __name__ == '__main__':
        help(Sample)
        help(Example)
        help(Dataclass)