from __future__ import annotations breaks typer in lower python version

[Asthestarsfalll]

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Example Code

# test.py
from __future__ import annotations

import typer
from typer import Argument as CArg
from typer import Option as  COp
from typing_extensions import Annotated

app = typer.Typer(rich_markup_mode="rich")


@app.command()
def foo(
    entry: Annotated[str, CArg()] = "test",
) -> None:
    print('foo')

app()

Description

In python 3.8 and 3.9, run

python test.py foo

It will raise error:

Usage: test.py [OPTIONS]
Try 'test.py --help' for help.
╭─ Error ────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮
│ Got unexpected extra argument (foo)                                                                                        │
╰────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯

Python 3.10 works well.

Operating System

Linux

Operating System Details

No response

Typer Version

0.12.5

Python Version

3.8/3.9

Additional Context

No response

[ckutlu]

I also ran into the same issue on python 3.9, when trying to use a custom class with a parser:

app = typer.Typer()
@app.command()
def subcommand(foo: Annotated[Foo, typer.Argument(parser=Foo.from_str)]): ...

results in

RuntimeError: Type not yet supported: <class '__main__.Foo'>

This was for a helper python script where I was using python 3.9 simply because the library that the helper script is "helping" has to support lower versions. I can easily switch to a recent version in this case, but it took me a while to figure out that the issue was a bug and not my misuse of typer.

@tiangolo I'd be happy to make a PR with a disclaimer in the documentation if you could point me the right place to do this. If you think the fix is easy, I could also take a jab at it as well.