Example run export necessity

[chasemcdo]

Is it required to wrap example functions in:

export const run = async () => {
  // Example code
}

The contribution docs say that you should do so; however, from my personal experience doing this leads to the run wrapper in the example if you import it into documentation and does not appear to impact the functionality of yarn example path/to/example.

Is there another scenario where this export is necessary or has its inclusion been deprecated?

[dosubot]

🤖

Hello again, @chasemcdo! It's good to see you contributing to the LangChain project!

Yes, it is necessary to wrap example functions in export const run = async () => {} in the langchainjs repository. This is because the example runner script is designed to import and execute a run function from the specified example file.

The script uses dynamic imports to load the example file based on the path provided in the command line arguments. It then attempts to destructure a run function from the imported module:

({ run: runExample } = await import(
  path.join(
    path.dirname(url.fileURLToPath(import.meta.url)),
    exampleRelativePath
  )));

If the run function is not exported from the example file, this will result in an error.

This does not impact the functionality of yarn example path/to/example or the documentation import process, as long as the run function is properly exported from the example file. The yarn example path/to/example command is designed to work with this structure, and the documentation import process should not be affected as long as the run function is properly documented in the example file.

You can refer to the examples/src/index.ts for more details.

Sources

• examples/src/index.ts
• examples/src/document_loaders/example_data/Star_Wars_The_Clone_Wars_S06E07_Crisis_at_the_Heart.srt

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