Fix urllib3 2.6.0+ compatibility in REST client

[f-wright]

Summary

• Replace deprecated getheaders() and getheader() methods with the headers property API in the REST client

Why

urllib3 2.6.0 removed the deprecated HTTPResponse.getheader() and HTTPResponse.getheaders() methods. Since our pyproject.toml specifies urllib3 = "^2.5.0", users who install with urllib3 2.6.0+ encounter:

AttributeError: 'HTTPResponse' object has no attribute 'getheader'

Implementation Details

Changed generated/groundlight_openapi_client/rest.py:

# Before (broken in urllib3 2.6.0+)
return self.urllib3_response.getheaders()
return self.urllib3_response.getheader(name, default)

# After (works in urllib3 1.26.x and 2.x)
return self.urllib3_response.headers
return self.urllib3_response.headers.get(name, default)

The new API using .headers and .headers.get() is backwards-compatible with both urllib3 1.26.x and 2.x.

Note

Since rest.py is auto-generated by OpenAPI Generator, consider applying a post-generation patch or updating to a newer generator version that produces urllib3 2.6+ compatible code.

🤖 Generated with Claude Code