Handle `super()` doc-string parameters in a clever/ simple way.

[blythed]

We currently have custom formatting statements __doc__ = __doc__.format(...). This should be handled in a simple way.

[jieguangzhou]

Yes, we need to do this. Something like this

import re
import inspect

def extract_params(docstring):
    """Extract :param lines from a docstring with their indentation."""
    if not docstring:
        return []
    return re.findall(r'(\s*:param [^:]+: [^\n]+)', docstring)

def merge_docs(cls):
    """Decorator to merge :param lines from all parent classes."""
    parent_params = set()
    for base in inspect.getmro(cls)[1:]:
        if base.__doc__:
            parent_params.update(extract_params(base.__doc__))
    
    if cls.__doc__:
        cls_params = set(extract_params(cls.__doc__))
    else:
        cls_params = set()

    unique_params = parent_params - cls_params

    # Combine the class's original docstring with the new parameters
    combined_doc = cls.__doc__ or ""
    if combined_doc and unique_params:
        combined_doc = combined_doc.rstrip() + "\n\n"
    combined_doc += "\n".join(unique_params)

    cls.__doc__ = combined_doc
    return cls

@merge_docs
class OpenAI:
    """OpenAI base class.
    
    :param api_key: The API key for authentication.
    :param timeout: The timeout for API requests.
    """

    def __init__(self, api_key, timeout):
        self.api_key = api_key
        self.timeout = timeout

@merge_docs
class OpenAIAudioTranslation(OpenAI):
    """OpenAI audio translation predictor.

    :param takes_context: Whether the model takes context into account.
    :param prompt: The prompt to guide the model's style. Should contain ``{context}``.
    """

    def __init__(self, api_key, timeout, takes_context, prompt):
        super().__init__(api_key, timeout)
        self.takes_context = takes_context
        self.prompt = prompt

# Print the updated __doc__ for the subclass
print(OpenAIAudioTranslation.__doc__)