Boolean in default annotation raise issue

[Smixi]

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• I already checked if it is not related to Typer but to Click.

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Example Code

import typer
from typing import Annotated
app = typer.Typer()
user_app = typer.Typer()

@user_app.command("create")
def create_user(a_boolean: Annotated[bool,
        typer.Option(
            default=False,
            help="Help string stufff ....",
        )]):
    print("did something")

app.add_typer(user_app)

if __name__ == "__main__":
    app()

Description

Hi, running the above script raises AttributeError: 'bool' object has no attribute 'isidentifier'

This is caused by the default=False option in the Option.
I use click 8.1.7, and this one works fine:

import click

@click.command()
@click.option("--mybool", default=False, help="Number of greetings.")
def hello(mybool):
    print("test", )

if __name__ == '__main__':
    hello()

Also, when I set the default value directly as a default argument it does works :

@user_app.command("create")
def create_user(a_boolean: Annotated[bool,
        typer.Option(
            help="Help string stufff ....",
        )] = False ):
    print("did something")

app.add_typer(user_app)

if __name__ == "__main__":
    app()

The docs says that default is supported, but it seems to works with strings, but not with bool.

Operating System

Linux

Operating System Details

Debian Bookworm

Typer Version

0.12.3

Python Version

3.11.2

Additional Context

No response

[ShihaoXu]

Hey, I hope it's not that late...

I've started to use Typer recently and encountered the same issue.
You can find a (maybe) related discussion here.

I have a fix for your issue. Instead of using default from within typer.Option(), try to set your default outside of Annotated[] like this:

def create_user(a_boolean: Annotated[bool,
        typer.Option(
            help="Help string stufff ....",
        )] = False):

THe code works with the fix.

[Smixi]

Yep, this is what the original post says :D.
The issue was also that this error is weird and the docs says the opposite.
I didn't tried if this is correct yet.