semantic-kernel/dotnet/samples/KernelSyntaxExamples/Example05_InlineFunctionDefinition.cs

// Copyright (c) Microsoft. All rights reserved.

using System;
using System.Threading.Tasks;
using Microsoft.SemanticKernel;
using RepoUtils;

// ReSharper disable once InconsistentNaming
public static class Example05_InlineFunctionDefinition
{
    public static async Task RunAsync()
    {
        Console.WriteLine("======== Inline Function Definition ========");

        string openAIModelId = TestConfiguration.OpenAI.ModelId;
        string openAIApiKey = TestConfiguration.OpenAI.ApiKey;

        if (openAIModelId == null || openAIApiKey == null)
        {
            Console.WriteLine("OpenAI credentials not found. Skipping example.");
            return;
        }

        /*
         * Example: normally you would place prompt templates in a folder to separate
         *          C# code from natural language code, but you can also define a semantic
         *          function inline if you like.
         */

        IKernel kernel = new KernelBuilder()
            .WithLogger(ConsoleLogger.Log)
            .WithOpenAITextCompletionService(
                modelId: openAIModelId,
                apiKey: openAIApiKey)
            .Build();

        // Function defined using few-shot design pattern
        const string FunctionDefinition = @"
Generate a creative reason or excuse for the given event.
Be creative and be funny. Let your imagination run wild.

Event: I am running late.
Excuse: I was being held ransom by giraffe gangsters.

Event: I haven't been to the gym for a year
Excuse: I've been too busy training my pet dragon.

Event: {{$input}}
";

        var excuseFunction = kernel.CreateSemanticFunction(FunctionDefinition, maxTokens: 100, temperature: 0.4, topP: 1);

        var result = await excuseFunction.InvokeAsync("I missed the F1 final race");
        Console.WriteLine(result);

        result = await excuseFunction.InvokeAsync("sorry I forgot your birthday");
        Console.WriteLine(result);

        var fixedFunction = kernel.CreateSemanticFunction($"Translate this date {DateTimeOffset.Now:f} to French format", maxTokens: 100);

        result = await fixedFunction.InvokeAsync();
        Console.WriteLine(result);
    }
}