# verify_interpreter_deps

> **Function** in `deepagents_code`

📖 [View in docs](https://reference.langchain.com/python/deepagents-code/extras_info/verify_interpreter_deps)

Check that `langchain-quickjs` is installed for the `--interpreter` flag.

Uses `importlib.util.find_spec` for a lightweight check with no actual
imports. Call this in the app process *before* spawning the server
subprocess so users get a clear, actionable error instead of an opaque
server crash when the optional `quickjs` extra is not installed.

Returns silently when the package is importable.

## Signature

```python
verify_interpreter_deps() -> None
```

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[View source on GitHub](https://github.com/langchain-ai/deepagents/blob/a98f0dfa8d534d8a1885b524632400e52db22ac6/libs/code/deepagents_code/extras_info.py#L342)