First Check

• I added a very descriptive title to this issue.
• I used the GitHub search to find a similar issue and didn't find it.
• I searched the Typer documentation, with the integrated search.
• I already searched in Google "How to X in Typer" and didn't find any information.
• I already read and followed all the tutorial in the docs and didn't find an answer.
• I already checked if it is not related to Typer but to Click.

Commit to Help

• I commit to help with one of those options 👆

Example Code

import typer
from typing import Union


def main(name: Union[str, int]):
    print(f"Hello {name}")


if __name__ == "__main__":
    typer.run(main)

Description

Typer does not yet support Union types. Running the above snippet yields:

AssertionError: Typer Currently doesn't support Union types

Not sure how much demand there is for this feature, but I'd personally love to have it.

Operating System

macOS

Operating System Details

No response

Typer Version

0.6.1

Python Version

3.10

Additional Context

Typer is amazing. Absolutely in love with it 💖.