Can we add support for functools.partial when adding commands?

[inkychris]

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Example Code

import functools
import typing

typing_get_type_hints = typing.get_type_hints


def get_type_hints(obj, *args, **kwargs):
    if isinstance(obj, functools.partial):
        obj = obj.func
    return typing_get_type_hints(obj, *args, **kwargs)


typing.get_type_hints = get_type_hints

import typer  # noqa: E402


def func(
    a: int,
    b: int = 1,
    c: str = 'default',
):
    '''my func description'''
    print(f'{a=}, {b=}, {c=}')


if __name__ == '__main__':
    app = typer.Typer()
    app.command('main', help=func.__doc__)(functools.partial(func, 123))
    app()

Description

I'd like to be able to add sub-commands to my CLI using functools.partial but typing.get_type_hints doesn't support it. I found that it's sufficient to change the call to this function in utils.py:get_params_from_function (with functools import):

--- type_hints = get_type_hints(func)
+++ type_hints = get_type_hints(func.func if isinstance(func, functools.partial) else func)

This is the alternative to the monkey patch included in the example code which demonstrates that the desired behaviour works.

It might also be desirable to allow typer.run() to accept a functools.partial. Currently there's no default command name and so it fails to determine one automatically because functools.partial doesn't have a __name__ attribute.

I'm happy to contribute a PR but wanted to make sure that it would be accepted first before adding tests and documentation for it, etc.

Operating System

Windows

Operating System Details

No response

Typer Version

0.9.0

Python Version

3.11.1

Additional Context

No response