[BUG][Python] Gradle plugin produces a broken Python client with syntax errors

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

I have an OpenAPI spec for which I can build a working Python client without errors using npx openapi-generator-cli generate. In our bigger project setup we use the Gradle plugin to generate a variety of clients for our API. In this setting, the generated Python client is exactly the same as the NPX CLI version, except for a syntax error due to a missing newline (see example below).

class DefaultApi:
    ..
    @validate_call
    def get_root(..):
        ..
        _response_types_map: Dict[str, Optional[str]] = {
            '200': "object",
        }        response_data = self.api_client.call_api(  # Note the missing newline here (before response_data)
            *_param,
            _request_timeout=_request_timeout
        )
        ..
    ..

The spec given here is a minimal example, but for a bigger spec the error repeats itself across all API operation methods, i.e. wherever the response_data = .. statement appears. The client built using NPX does not have this issue.

openapi-generator version

7.8.0

OpenAPI declaration file content or url

{
    "openapi": "3.1.0",
    "info": {
        "title": "My API",
        "version": "0.1.0"
    },
    "paths": {
        "/": {
            "get": {
                "summary": "Get Root",
                "operationId": "get_root",
                "responses": {
                    "200": {
                        "description": "Successful Response",
                        "content": {
                            "application/json": {
                                "schema": {
                                    "type": "object",
                                    "title": "Response Get Root"
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}

Generation Details

generatorName: python
additionalProperties:
  packageName: my_python_client
  packageVersion: 0.1.0
  projectName: my-python-client

Steps to reproduce

Build Python client based on above specs using the OpenAPI Generator Gradle plugin.

Related issues/PRs

No related issues found.

Suggest a fix

Clueless as to why this happens with the Gradle plugin. Any help is much appreciated!

Start by reproducing the minimal OpenAPI declaration with the OpenAPI Generator Gradle plugin and compare its Python output with the npx openapi-generator-cli output. Inspect the generated API operation methods around the response_data statement; done means the Gradle-generated client has valid Python syntax and matches the working npx output.