Make typer.Context generic for easier typing Context.obj

[Eggiverse]

First Check

• I added a very descriptive title here.
• I used the GitHub search to find a similar question and didn't find it.
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• I already read and followed all the tutorials in the docs and didn't find an answer.
• I already checked if it is not related to Typer but to Click.

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Example Code

import Typer

app = typer.Typer()

@dataclass
class MyObj:
    prop: int
# Currently
@app.command()
def my_command(ctx: typer.Context):
    obj: MyObj = ctx.obj # I have to specify type of object here
    print(obj.prop)

# If `typer.Context` is generic
@app.command()
def my_command(ctx: typer.Context[MyObj]):
    obj = ctx.obj # type is automatically inferred
    print(obj.prop)

# Possible solution. Not tested yet.
# Modify `typer.Context` as
class Context[T](click.Context):
    obj: T

Description

I used to use click and frequently use click.pass_obj since I do not use other features in Context. I usually type my object in the command definition like this:

class MyObj:
    ...

@click.command()
@click.pass_obj
def my_command(obj: MyObj, ...):
    ... # My type checker is aware that `obj` is of type `MyObj`

In Typer, I would have to do this:

@app.command()
def my_command(ctx: typer.Context, ...):
    obj: MyObj = ctx.obj # I have to specify type of object here
    print(obj.prop)

I believe it would be better if I can still specify object type in type annotation. Making typing.Conext generic might be a solution.

@app.command()
def my_command(ctx: typer.Context[MyObj], ...):
    obj = ctx.obj # type is automatically inferred
    print(obj.prop)

Operating System

Windows

Operating System Details

No response

Typer Version

0.13.1

Python Version

3.12

Additional Context

No response

[AtticusZeller]

same problem