fix(py/samples/google-genai-hello): fix dependency on evaluators plugin #3952

[yesudeep]

Fix for:

zsh❯ genkit start -- uv run --python python3.10 samples/google-genai-hello/src/google_genai_hello.py
Indexed 0 traces in 1ms in /Users/yesudeep/code/github.com/firebase/genkit/py/.genkit/traces_idx
Telemetry API running on http://localhost:4033
Project root: /Users/yesudeep/code/github.com/firebase/genkit/py
Genkit Developer UI: http://localhost:4000
Using CPython 3.10.16
Creating virtual environment at: .venv
   Building genkit @ file:///Users/yesudeep/code/github.com/firebase/genkit/py/packages/genkit
   Building genkit-plugin-anthropic @ file:///Users/yesudeep/code/github.com/firebase/genkit/py/plugins/anthropic
   Building genkit-plugin-compat-oai @ file:///Users/yesudeep/code/github.com/firebase/genkit/py/plugins/compat-oai
   Building genkit-plugin-dev-local-vectorstore @ file:///Users/yesudeep/code/github.com/firebase/genkit/py/plugins/dev-local-vectorstore
   Building genkit-plugin-firebase @ file:///Users/yesudeep/code/github.com/firebase/genkit/py/plugins/firebase
   Building genkit-plugin-flask @ file:///Users/yesudeep/code/github.com/firebase/genkit/py/plugins/flask
   Building genkit-plugin-google-cloud @ file:///Users/yesudeep/code/github.com/firebase/genkit/py/plugins/google-cloud
   Building genkit-plugin-google-genai @ file:///Users/yesudeep/code/github.com/firebase/genkit/py/plugins/google-genai
   Building genkit-plugin-ollama @ file:///Users/yesudeep/code/github.com/firebase/genkit/py/plugins/ollama
   Building genkit-plugin-vertex-ai @ file:///Users/yesudeep/code/github.com/firebase/genkit/py/plugins/vertex-ai
      Built genkit-plugin-firebase @ file:///Users/yesudeep/code/github.com/firebase/genkit/py/plugins/firebase
      Built genkit @ file:///Users/yesudeep/code/github.com/firebase/genkit/py/packages/genkit
      Built genkit-plugin-ollama @ file:///Users/yesudeep/code/github.com/firebase/genkit/py/plugins/ollama
      Built genkit-plugin-vertex-ai @ file:///Users/yesudeep/code/github.com/firebase/genkit/py/plugins/vertex-ai
      Built genkit-plugin-dev-local-vectorstore @ file:///Users/yesudeep/code/github.com/firebase/genkit/py/plugins/dev-local-vectorstore
      Built genkit-plugin-google-genai @ file:///Users/yesudeep/code/github.com/firebase/genkit/py/plugins/google-genai
      Built genkit-plugin-flask @ file:///Users/yesudeep/code/github.com/firebase/genkit/py/plugins/flask
      Built genkit-plugin-anthropic @ file:///Users/yesudeep/code/github.com/firebase/genkit/py/plugins/anthropic
      Built genkit-plugin-compat-oai @ file:///Users/yesudeep/code/github.com/firebase/genkit/py/plugins/compat-oai
      Built genkit-plugin-google-cloud @ file:///Users/yesudeep/code/github.com/firebase/genkit/py/plugins/google-cloud
Installed 237 packages in 921ms
2025-12-16 14:35:36 [debug    ] Creating a new global tracer provider for telemetry.
2025-12-16 14:35:36 [debug    ] local_telemetry_server exporter added succesfully.
Traceback (most recent call last):
  File "/Users/yesudeep/code/github.com/firebase/genkit/py/samples/google-genai-hello/src/google_genai_hello.py", line 51, in <module>
    from genkit.plugins.evaluators import (
ModuleNotFoundError: No module named 'genkit.plugins.evaluators'
/Users/yesudeep/.local/share/pnpm/global/5/.pnpm/@[email protected]_@[email protected]/node_modules/@genkit-ai/tools-common/lib/cjs/src/manager/process-manager.js:54
                    reject(new Error(`app process exited with code ${code}`));
                           ^

Error: app process exited with code 1
    at ChildProcess.<anonymous> (/Users/yesudeep/.local/share/pnpm/global/5/.pnpm/@[email protected]_@[email protected]/node_modules/@genkit-ai/tools-common/lib/cjs/src/manager/process-manager.js:54:28)
    at ChildProcess.emit (node:events:507:28)
    at ChildProcess._handle.onexit (node:internal/child_process:294:12)

Node.js v23.11.1

[gemini-code-assist]

Summary of Changes

Hello @yesudeep, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request resolves a dependency issue by integrating the genkit-plugin-evaluators into the Python project's dependency management system. This change ensures that any components or samples relying on this plugin will have the necessary dependencies correctly configured and locked, facilitating consistent and reproducible environments.

Highlights

• Dependency Addition: The genkit-plugin-evaluators dependency has been added to the project's pyproject.toml file, ensuring its availability for the Python samples.
• Lock File Update: The uv.lock file has been updated to reflect the newly added genkit-plugin-evaluators dependency, including its editable path, and its revision number has been incremented.

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[gemini-code-assist]

Code Review

This pull request adds the genkit-plugin-evaluators dependency to the Python workspace. The changes in pyproject.toml and uv.lock correctly include the new plugin. My only suggestion is to maintain alphabetical order for the dependencies in pyproject.toml for better readability and maintainability, similar to how other dependency lists in the file are structured.

[yesudeep]

/gemini review

[gemini-code-assist]

Code Review

This pull request correctly addresses a ModuleNotFoundError by adding the missing genkit-plugin-evaluators dependency. The changes in py/pyproject.toml are correct, and I appreciate that you also took the time to sort the dependencies alphabetically, which improves maintainability. The lock file updates are as expected. This is a solid fix, well done.