Class title is not the name of the class but a string representation of it.

[eldadcool]

🐛 Bug report

The title of a class added using "add_class_arguments" is printed as str(TestClass) instead of TestClass.__name__ as expected.
This lead to the title be: "<class 'main.TestClass'>" instead of "TestClass"

To reproduce

from jsonargparse import ArgumentParser

class TestClass:
    def __init__(self, test_field: int = 5):
        pass

parser = ArgumentParser()
parser.add_class_arguments(TestClass)
parser.print_help()

The result is:

usage: [-h] [--test_field TEST_FIELD]

options:
  -h, --help            Show this help message and exit.

<class '__main__.TestClass'>:
  --test_field TEST_FIELD
                        (type: int, default: 5)

Expected behavior

usage: [-h] [--test_field TEST_FIELD]

options:
  -h, --help            Show this help message and exit.

TestClass:
  --test_field TEST_FIELD
                        (type: int, default: 5)

Environment

• jsonargparse version: 4.33.2
• Python version: 3.10.12
• How jsonargparse was installed: pip install jsonargparse
• OS: wsl2

[mauvilsa]

Thank you for reporting! Actually this was implemented explicitly like this. The idea was more that people would add docstrings to their classes and functions. But sure, it could be changed to not be a raw str conversion. Though, if changed, I would say it should be a short phrase instead of just the class name, e.g. f"Options for {function_or_class.__name__}".

[mauvilsa]

@eldadcool would you be interested in contributing the change?

[eldadcool]

Sure, I will create a pull request as soon as I will have time to work on it