Semantic Kernel for Natural Language Processing

Natural language processing (NLP) benefits greatly from semantic kernels. By expressing words as high-dimensional vectors rather than simply strings of letters, they enable computers to interpret the meaning of words in a more complex way. This enables computers to detect word associations, such as synonyms and antonyms, without the requirement for explicit rules or human supervision.

What is Semantic Kernel?

Semantic Kernel (SK) is a lightweight SDK that allows AI Large Language Models (LLMs) to be integrated with traditional programming languages. The SK extensible programming model combines natural language semantic functions, conventional code native functions, and embeddings-based memory to unlock new possibilities and provide value to AI-powered systems.

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SDK that allows you to quickly combine AI prompts with traditional programming languages such as C# and Python.

Orchestrating AI with Semantic Kernel

The real power of Semantic Kernel derives from its ability to mix various components. You may design sophisticated pipelines that employ AI to automate complicated operations by combining several AI models, native functions, and memory within Semantic Kernel.

For example, you might utilize Semantic Kernel to build a pipeline that assists a user in sending an email to their marketing staff. With memory, you might obtain project information and then utilize planner to autogenerate the next stages (for example, grounding the user’s request with Microsoft Graph data, generating a response with GPT-4, and sending the email). Finally, in your custom app, you may display a success message to the user.

The steps described outline the process of interacting with the Semantic Kernel in an AI application. Here’s a breakdown of each step:

How to use Semantic Kernel

You can run the Semantic Kernel getting started guidelines in C# or Python in only a few steps. After finishing the tutorials, you’ll be able to…

• Configure your local machine to run Semantic Kernel
• Run prompts from the kernel.
• Make prompts dynamic with variables.
• Create prompt chains.
• Automatically create new chains with the planner
• Store and retrieve memory with embeddings.

Requirements to run the guides.

Before running the guides in C#, make sure you have the following installed on your local machine. If you are using the Python guides, you just need git and python.

• git or the GitHub application
• VSCode vs. Visual Studio
• An OpenAI key obtained using the Azure OpenAI Service or OpenAI
• .Net 7 SDK – C# notebook documentation
• The Polyglot Notebook in VS Code – for notebook instructions

C#

1. Create a new console app.

2. Add the semantic kernel nuget 

#r "nuget: Microsoft.SemanticKernel, *-*"

3. Copy the code from here into the app Program.cs file.

4. Replace the configuration placeholders for API key and other params with your key and settings.

5. Run with F5 or dotnet run

Python

1. Install the pip package

pip install semantic-kernel

2. Create a new script e.g. hello-world.py.

3. Store your API key and settings in an .env file as described here.

4. Copy the code from here into the hello-world.py script.

5. Run the python script.

Download and run the Guides.

1. Use your web browser to visit aka.ms/sk/repo on GitHub.
2. Clone or fork the repo to your local machine.
3. While the repository is open in VS Code, navigate to the semantic-kernel/samples/notebooks folder.
4. Choose either the .Net or Python folder based on your preferred programming language.
5. Open the 00-getting-started.ipynb notebook.
6. Activate each code snippet with the “play” button on the left hand side. If you need help running the 00-getting-started.ipynb notebook, you can watch the video below.
7. Repeat for the remaining notebooks.

Getting started with C# notebook

1: Configure your AI service credentials

Use this notebook first, to choose whether to run these notebooks with OpenAI or Azure OpenAI, and to save your credentials in the configuration file.

// Load some helper functions, e.g. to load values from settings.json
#!import config/Settings.cs

2: Import Semantic Kernel SDK from NuGet

// Import Semantic Kernel
#r "nuget: Microsoft.SemanticKernel, 0.14.547.1-preview"

3: Instantiate the Kernel

using Microsoft.SemanticKernel;

// Set Simple kernel instance
IKernel kernel = KernelBuilder.Create();

// Configure AI service credentials used by the kernel
var (useAzureOpenAI, model, azureEndpoint, apiKey, orgId) = Settings.LoadFromFile();

if (useAzureOpenAI)
    kernel.Config.AddAzureTextCompletionService(model, azureEndpoint, apiKey);
else
    kernel.Config.AddOpenAITextCompletionService(model, apiKey, orgId);

4: Load and Run a Skill

// Load the Skills Directory
var skillsDirectory = Path.Combine(System.IO.Directory.GetCurrentDirectory(), "..", "..", "skills");

// Load the FunSkill from the Skills Directory
var funSkillFunctions = kernel.ImportSemanticSkillFromDirectory(skillsDirectory, "FunSkill");

// Run the Function called Joke
var result = await funSkillFunctions["Joke"].InvokeAsync("time travel to dinosaur age");

// Return the result to the Notebook
Console.WriteLine(result);

Getting started with Python notebook

1. Import Semantic Kernel SDK from pypi.org

!python -m pip install semantic-kernel==0.2.7.dev0

import semantic_kernel as sk

kernel = sk.Kernel()

Using OpenAI

2. Add your Open AI Key key to a .env file in the same folder (org Id only if you have multiple orgs):

OPENAI_API_KEY="sk-..."
OPENAI_ORG_ID=""

and add OpenAI Text Completion to the kernel:

from semantic_kernel.connectors.ai.open_ai import OpenAITextCompletion

api_key, org_id = sk.openai_settings_from_dot_env()

kernel.add_text_completion_service("dv", OpenAITextCompletion("text-davinci-003", api_key, org_id))

Using Azure OpenAI

3. Add your Azure Open AI Service key settings to a .env file in the same folder:

AZURE_OPENAI_API_KEY="..."
AZURE_OPENAI_ENDPOINT="https://..."
AZURE_OPENAI_DEPLOYMENT_NAME="..."

and add Azure OpenAI Text Completion to the kernel:

from semantic_kernel.connectors.ai.open_ai import AzureTextCompletion

deployment, api_key, endpoint = sk.azure_openai_settings_from_dot_env()

kernel.add_text_completion_service("dv", AzureTextCompletion(deployment, endpoint, api_key))

Run a Semantic Function

4. Load a Skill and run a semantic function:

skill = kernel.import_semantic_skill_from_directory("../../skills", "FunSkill")
joke_function = skill["Joke"]

print(joke_function("time travel to dinosaur age"))

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This article is to help you learn the semantic kernel. We trust that it has been helpful to you. Please feel free to share your thoughts and feedback in the comment section below.