fix(lint): suppress PLR0915 in complex transform methods

[jquinter]

Summary

• Suppress Ruff PLR0915 (too-many-statements) on 3 methods that legitimately need many statements for event/message transformation logic
• streaming_iterator.py::_process_event (84 statements)
• transformation.py::translate_messages_to_responses_input (51 statements)
• transformation.py::transform_realtime_response (54 statements)

These are complex transformation methods where splitting would reduce readability. Suppressing the lint warning is the appropriate fix.

Test plan

• ruff check passes with no PLR0915 errors
• CI lint job passes

🤖 Generated with Claude Code

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Project	Deployment	Actions	Updated (UTC)
litellm	Ready	Preview, Comment	Feb 28, 2026 2:19am

[greptile-apps]

Greptile Summary

Suppresses Ruff PLR0915 (too-many-statements) lint warnings on three complex event/message transformation methods by adding inline # noqa: PLR0915 comments. No functional code changes.

• _process_event in streaming_iterator.py (84 statements): dispatches Responses API events to Anthropic chunk format
• translate_messages_to_responses_input in transformation.py (51 statements): converts Anthropic messages to Responses API input items
• transform_realtime_response in Gemini transformation.py (54 statements): transforms Gemini realtime events to OpenAI format

This follows the well-established codebase pattern — there are 100+ existing # noqa: PLR0915 suppressions across the project for similar complex transformation/dispatch methods.

Confidence Score: 5/5

• This PR is safe to merge — it only adds lint suppression comments with zero functional code changes.
• The PR makes 3 single-character-range changes (adding # noqa: PLR0915 comments) with no functional impact. The suppressed methods are legitimate complex dispatchers where the statement count is inherent to the problem domain. The pattern is widely established in this codebase (100+ existing suppressions).
• No files require special attention.

Important Files Changed

Filename	Overview
litellm/llms/anthropic/experimental_pass_through/responses_adapters/streaming_iterator.py	Adds # noqa: PLR0915 to _process_event method (84 statements) — a complex event-type dispatcher where splitting would reduce readability. No functional changes.
litellm/llms/anthropic/experimental_pass_through/responses_adapters/transformation.py	Adds # noqa: PLR0915 to translate_messages_to_responses_input method (51 statements) — a message format translator with many branches. No functional changes.
litellm/llms/gemini/realtime/transformation.py	Adds # noqa: PLR0915 to transform_realtime_response method (54 statements) — a realtime event transformer with many event type branches. No functional changes.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[Ruff Lint Check] --> B{PLR0915 too-many-statements}
    B -->|streaming_iterator.py| C["_process_event\n84 statements\n# noqa: PLR0915"]
    B -->|transformation.py\nAnthropic| D["translate_messages_to_responses_input\n51 statements\n# noqa: PLR0915"]
    B -->|transformation.py\nGemini| E["transform_realtime_response\n54 statements\n# noqa: PLR0915"]
    C --> F[Lint passes ✓]
    D --> F
    E --> F

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[greptile-apps]

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[jquinter]

@shin-bot-litellm evaluate this PR

[jquinter]

CI Failure: MCP test failures

These 3 MCP test failures are pre-existing on main and unrelated to this PR's lint suppression changes.

Root cause: Tests mock filter_server_ids_by_ip (old method name) but the code now calls filter_server_ids_by_ip_with_info (returns a tuple).

Fix PR: #22327

[jquinter]

CI Failure: MyPy type errors (21 errors in 9 files)

These MyPy errors are pre-existing on main and unrelated to this PR. This PR only adds # noqa: PLR0915 comments (Ruff lint suppressions), which cannot introduce MyPy type errors.

The 21 errors span 9 files across the codebase:

• proxy/middleware/in_flight_requests_middleware.py (4 errors)
• responses_adapters/transformation.py (2 errors)
• responses_adapters/streaming_iterator.py (2 errors)
• responses_adapters/handler.py (1 error)
• litellm_core_utils/realtime_streaming.py (3 errors)
• completion_extras/litellm_responses_transformation/transformation.py (2 errors)
• proxy/auth/user_api_key_auth.py (2 errors)
• proxy/public_endpoints/public_endpoints.py (3 errors)
• proxy/management_endpoints/project_endpoints.py (2 errors)

All verified to exist on main.