Get started with the chat by using your own data sample for Python

This article shows you how to deploy and run the chat app with your own data sample for Python. This sample implements a chat app by using Python, Azure OpenAI Service, and Retrieval Augmented Generation (RAG) in Azure AI Search to get answers about employee benefits at a fictitious company. The app is seeded with PDF files that include the employee handbook, a benefits document, and a list of company roles and expectations.

Watch the following demo video.

By following the instructions in this article, you:

• Deploy a chat app to Azure.
• Get answers about employee benefits.
• Change settings to change the behavior of responses.

After you finish this procedure, you can start modifying the new project with your custom code.

This article is part of a collection of articles that show you how to build a chat app by using Azure OpenAI and Azure AI Search.

Other articles in the collection include:

• .NET
• Java
• JavaScript
• JavaScript frontend + Python backend

Note

This article uses one or more AI app templates as the basis for the examples and guidance in the article. AI app templates provide you with well-maintained reference implementations that are easy to deploy. They help to ensure a high-quality starting point for your AI apps.

Architectural overview

The following diagram shows a simple architecture of the chat app.

Key components of the architecture include:

• A web application to host the interactive chat experience.

• An Azure AI Search resource to get answers from your own data.

• Azure OpenAI to provide:

  • Keywords to enhance the search over your own data.
  • Answers from the Azure OpenAI model.
  • Embeddings from the ada model.

Cost

Most resources in this architecture use a basic or consumption pricing tier. Consumption pricing is based on usage, which means that you only pay for what you use. There's a charge to complete this article, but it's minimal. When you're finished with the article, you can delete the resources to stop incurring charges.

Learn more about cost in the sample repo.

Prerequisites

A development container environment is available with all the dependencies that are required to complete this article. You can run the development container in GitHub Codespaces (in a browser) or locally by using Visual Studio Code.

To use this article, you need the following prerequisites.

GitHub Codespaces (recommended)

• An Azure subscription. Create one for free.
• Azure account permissions. Your Azure account must have Microsoft.Authorization/roleAssignments/write permissions, such as User Access Administrator or Owner.
• A GitHub account.

Visual Studio Code

• An Azure subscription. Create one for free.
• Azure account permissions. Your Azure account must have Microsoft.Authorization/roleAssignments/write permissions, such as User Access Administrator or Owner.
• Azure Developer CLI.
• Docker Desktop. Start Docker Desktop if it's not already running.
• Visual Studio Code.
• Dev Containers extension.

Open a development environment

Begin now with a development environment that has all the dependencies installed to complete this article.

GitHub Codespaces (recommended)

GitHub Codespaces runs a development container managed by GitHub with Visual Studio Code for the Web as the user interface (UI). For the most straightforward development environment, use GitHub Codespaces so that you have the correct developer tools and dependencies preinstalled to complete this article.

Important

All GitHub accounts can use GitHub Codespaces for up to 60 hours free each month with two core instances. For more information, see GitHub Codespaces monthly included storage and core hours.

1. Start the process to create a new GitHub codespace on the main branch of the Azure-Samples/azure-search-openai-demo GitHub repository.

2. Right-click the following button, and select Open link in new windows to have the development environment and the documentation available at the same time.

   

3. On the Create codespace page, review the codespace configuration settings, and then select Create codespace.

   

4. Wait for the codespace to start. This startup process can take a few minutes.

5. In the terminal at the bottom of the screen, sign in to Azure with the Azure Developer CLI:

   azd auth login
   

6. Copy the code from the terminal and then paste it into a browser. Follow the instructions to authenticate with your Azure account.

The remaining tasks in this article take place in the context of this development container.

Visual Studio Code

The Dev Containers extension for Visual Studio Code requires Docker to be installed on your local machine. The extension hosts the development container locally by using the Docker host with the correct developer tools and dependencies preinstalled to complete this article.

1. Create a new local directory on your computer for the project:

   mkdir my-intelligent-app && cd my-intelligent-app
   

2. Open Visual Studio Code in that directory:

   code .
   

3. Open a new terminal in Visual Studio Code.

4. Run the following AZD command to bring the GitHub repository to your local computer:

   azd init -t azure-search-openai-demo
   

5. Open the Command palette, and search for and select Dev Containers: Open Folder in Container to open the project in a dev container. Wait until the dev container opens before you continue.

6. Sign in to Azure with the Azure Developer CLI:

   azd auth login
   

   Copy the code from the terminal and then paste it into a browser. Follow the instructions to authenticate with your Azure account.

The remaining exercises in this project take place in the context of this development container.

Deploy and run

The sample repository contains all the code and configuration files you need to deploy a chat app to Azure. The following steps walk you through the process of deploying the sample to Azure.

Deploy the chat app to Azure

Important

Azure resources created in this section incur immediate costs, primarily from the Azure AI Search resource. These resources might accrue costs even if you interrupt the command before it's fully executed.

1. Run the following Azure Developer CLI command to provision the Azure resources and deploy the source code:

   azd up
   

2. If you're prompted to enter an environment name, keep it short and use lowercase letters. An example is myenv. It's used as part of the resource group name.

3. When prompted, select a subscription in which to create the resources.

4. When you're prompted to select a location the first time, select a location near you. This location is used for most of the resources, including hosting.

5. If you're prompted for a location for the Azure OpenAI model or for the Azure AI Document Intelligence resource, select the location closest to you. If the same location is available as your first location, select that.

6. Wait 5 or 10 minutes after the app deploys before you continue.

7. After the application successfully deploys, a URL appears in the terminal.

   

8. Select the URL labeled (✓) Done: Deploying service webapp to open the chat application in a browser.

   

Use the chat app to get answers from PDF files

The chat app is preloaded with employee benefits information from PDF files. You can use the chat app to ask questions about the benefits. The following steps walk you through the process of using the chat app. Your answers might vary as the underlying models are updated.

1. In the browser, select or enter What happens in a performance review? in the chat text box.

   

2. From the answer, select a citation.

   

3. On the right pane, use the tabs to understand how the answer was generated.

   Tab	Description
   Thought process	This tab is a script of the interactions in chat. You can view the system prompt (content) and your user question (content).
   Supporting content	This tab includes the information to answer your question and the source material. The number of source material citations is noted in Developer settings. The default value is 3.
   Citation	This tab displays the original page that contains the citation.

4. When you're finished, select the tab again to close the pane.

Use chat app settings to change the behavior of responses

The intelligence of the chat is determined by the Azure OpenAI model and the settings that are used to interact with the model.

Setting	Description
Override prompt template	Overrides the prompt used to generate the answer based on the question and search results.
Temperature	Sets the temperature of the request to the large language model (LLM) that generates the answer. Higher temperatures result in more creative responses, but they might be less grounded.
Seed	Sets a seed to improve the reproducibility of the model's responses. The seed can be any integer.
Minimum search score	Sets a minimum score for search results that come back from Azure AI Search. The score range depends on whether you're using hybrid (default), vectors only, or text only.
Minimum reranker score	Sets a minimum score for search results that come back from the semantic reranker. The score always ranges between 0 and 4. The higher the score, the more semantically relevant the result is to the question.
Retrieve this many search results	Sets the number of search results to retrieve from Azure AI Search. More results might increase the likelihood of finding the correct answer. But more results might also lead to the model getting "lost in the middle." You can see these sources returned on the Thought process and Supporting content tabs of the citation.
Exclude category	Specifies a category to exclude from the search results. There are no categories used in the default data set.
Use semantic ranker for retrieval	Enables the Azure AI Search semantic ranker, which is a model that reranks search results based on semantic similarity to the user's query.
Use semantic captions	Sends semantic captions to the LLM instead of the full search result. A semantic caption is extracted from a search result during the process of semantic ranking.
Suggest follow-up questions	Asks the LLM to suggest follow-up questions based on the user's query.
Retrieval mode	Sets the retrieval mode for the Azure AI Search query. Vectors + Text (Hybrid) uses a combination of vector search and full text search. Vectors uses only vector search. Text uses only full text search. Hybrid is generally optimal.
Stream chat completion responses	Continuously streams the response to the chat UI as it's generated.

The following steps walk you through the process of changing the settings.

1. In the browser, select the Developer Settings tab.

2. Select the Suggest follow-up questions checkbox and ask the same question again.

   What happens in a performance review?
   

   The chat returned suggested follow-up questions, such as the following examples:

   1. What is the frequency of performance reviews?
   2. How can employees prepare for a performance review?
   3. Can employees dispute the feedback received during the performance review?
   

3. On the Settings tab, clear the Use semantic ranker for retrieval checkbox.

4. Ask the same question again.

   What happens in a performance review?
   

5. What's the difference in the answers?

   • With the semantic ranker: During a performance review at Contoso Electronics, employees have the opportunity to discuss their successes and challenges in the workplace (1). The review provides positive and constructive feedback to help employees develop and grow in their roles (1). The employee receives a written summary of the performance review, which includes a rating of their performance, feedback, and goals and objectives for the upcoming year (1). The performance review is a two-way dialogue between managers and employees (1).
   • Without the semantic ranker: During a performance review at Contoso Electronics, employees have the opportunity to discuss their successes and challenges in the workplace. Positive and constructive feedback is provided to help employees develop and grow in their roles. A written summary of the performance review is given, including a rating of performance, feedback, and goals for the upcoming year. The review is a two-way dialogue between managers and employees (1).

Clean up resources

The following steps walk you through the process of cleaning up the resources you used.

Clean up Azure resources

The Azure resources created in this article are billed to your Azure subscription. If you don't expect to need these resources in the future, delete them to avoid incurring more charges.

Run the following Azure Developer CLI command to delete the Azure resources and remove the source code:

azd down --purge --force

The switches provide:

• purge: Deleted resources are immediately purged so that you can reuse the Azure OpenAI tokens per minute.
• force: The deletion happens silently, without requiring user consent.

Clean up GitHub Codespaces and Visual Studio Code

GitHub Codespaces

Deleting the GitHub Codespaces environment ensures that you can maximize the amount of free per-core hours entitlement that you get for your account.

Important

For more information about your GitHub account's entitlements, see GitHub Codespaces monthly included storage and core hours.

1. Sign in to the GitHub Codespaces dashboard.

2. Locate your currently running codespaces that are sourced from the Azure-Samples/azure-search-openai-demo GitHub repository.

   

3. Open the context menu for the codespace, and then select Delete.

   

Visual Studio Code

You aren't necessarily required to clean up your local environment, but you can stop the running development container and return to running Visual Studio Code in the context of a local workspace.

1. Open the Command palette and search for the Dev Containers commands.

2. Select Dev Containers: Reopen Folder Locally.

   

Tip

Visual Studio Code stops the running development container, but the container still exists in Docker in a stopped state. You always have the option to delete the container instance, container image, and volumes from Docker to free up more space on your local machine.

Get help

This sample repository offers troubleshooting information.

If your issue isn't addressed, add your issue to the repository's Issues webpage.

Related content

• Get the source code for the sample used in this article.
• Build a chat app with Azure OpenAI best-practices solution architecture.
• Learn about access control in generative AI apps with Azure AI Search.
• Build an enterprise-ready Azure OpenAI solution with Azure API Management.
• See Azure AI Search: Outperforming vector search with hybrid retrieval and ranking capabilities.