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Document QA

This flow demonstrates adding a file to the File component to load a document from your local machine into your flow.

Prerequisites​

Create the document QA flow​

  1. From the Langflow dashboard, click New Flow.
  2. Select Document QA.
  3. The Document QA flow is created.

Document QA starter flow

This flow is composed of a chatbot with the Chat Input, Prompt, Language model, and Chat Output components, but also incorporates a File component, which loads a file from your local machine. The Parser component converts the data from the File component into the Prompt component as {Document}.

The Prompt component is instructed to answer questions based on the contents of {Document}. This gives the OpenAI component context it would not otherwise have access to.

Run the document QA flow​

  1. Add your OpenAI API key to the Language model model component. Optionally, create a global variable for the OpenAI API key.

    1. In the OpenAI API Key field, click Globe, and then click Add New Variable.
    2. In the Variable Name field, enter openai_api_key.
    3. In the Value field, paste your OpenAI API Key (sk-...).
    4. Click Save Variable.

  2. To select a document to load, in the File component, click the Select files button. Select a local file or a file loaded with File management, and then click Select file. The file name appears in the component.

  3. To run the flow, click  Playground. Enter a question about the loaded document's content. You should receive a contextual response indicating that the LLM has read your document.

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