AST union types should be compatible with python <3.10

[usefulalgorithm]

For older versions of Python it is not allowed to write union types like

Foo = Bar | Baz

This would not work even if from __future__ import annotations is in the code.

To make it compatible with Python < 3.10, it has to be:

from typing import Union
Foo = Union[Bar, Baz]

---

Note that with from __future__ import annotations it is OK to have the following in Python <3.10:

def foo(
    bar: str | int,
):

---

Thanks!

[criccomini]

Good catch! Thanks. I've merged and will publish a PyPi shortly.

[criccomini]

Published 0.4.0!

https://pypi.org/project/proto-schema-parser/#history