Unable to specify a path for a callable parameter of a class

[function2-llx]

🐛 Bug report

When define a parameter of a class to be callable type, it is unable to specify a path for this parameter.

To reproduce

from collections.abc import Callable

from jsonargparse import ArgumentParser

class B:
    def __init__(self, x: int):
        self.x = x

class A:
    def __init__(self, b: Callable[[int], B]):
        self.b = b(id(self))

def main():
    parser = ArgumentParser()
    parser.add_class_arguments(A, 'a', sub_configs=True)
    '''
        content of b.yaml:
        class_path: B
    '''
    args = parser.parse_args(['--a.b', 'b.yaml'])

if __name__ == '__main__':
    main()

Expected behavior

Actual output

usage: test.py [-h] [--a CONFIG] --a.b B
error: Parser key "a.b":
  Type collections.abc.Callable[[int], __main__.B] expects a function or a callable class: No module named 'b'. Got value: b.yaml

Environment

• jsonargparse version: 4.27.0
• Python version: 3.11.6
• How jsonargparse was installed: jsonargparse[signatures, omegaconf]
• OS: Linux

[mauvilsa]

Fixed with #424. Thank you for reporting!