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Azure Functions Cheat Sheet

Azure Functions Cheat Sheet

Reference for building, triggering, and deploying Azure Functions using bindings, triggers, and the Azure Functions Core Tools.

2 PagesIntermediateFeb 2, 2026

Python HTTP Trigger

Basic HTTP-triggered function.

python
import azure.functions as funcimport jsonapp = func.FunctionApp()@app.route(route="hello", auth_level=func.AuthLevel.ANONYMOUS)def hello(req: func.HttpRequest) -> func.HttpResponse:    name = req.params.get('name', 'World')    return func.HttpResponse(        json.dumps({"message": f"Hello, {name}!"}),        mimetype="application/json",        status_code=200    )

Azure Functions Core Tools

Local development and deployment commands.

bash
func init MyFunctionApp --python       # Scaffold projectfunc new --name HttpExample --template "HTTP trigger"func start                             # Run locallyfunc azure functionapp publish myFuncApp  # Deploy to Azure

Provisioning with az CLI

Create the Function App resource in Azure.

bash
az functionapp create \  --resource-group myRG \  --consumption-plan-location eastus \  --runtime python --runtime-version 3.11 \  --functions-version 4 \  --name myUniqueFuncApp \  --storage-account mystorageacct

Triggers & Bindings

Key triggers & bindings to know.

  • HTTP Trigger- Invokes the function on an incoming HTTP request
  • Timer Trigger- Runs on a CRON schedule (e.g. "0 */5 * * * *")
  • Blob Trigger- Fires when a blob is created/updated in Azure Storage
  • Queue Trigger- Processes messages from Azure Storage Queue or Service Bus
  • Output Binding- Declarative way to write data (e.g. to Cosmos DB) without SDK boilerplate

Hosting Plans

Key hosting plans to know.

  • Consumption Plan- Pay-per-execution, auto-scales, has cold starts
  • Premium Plan- Pre-warmed instances, VNet integration, no cold starts
  • Dedicated (App Service) Plan- Runs on reserved VMs, predictable cost, no auto-scale to zero
  • Container Apps hosting- Run functions as containers on Azure Container Apps
Pro Tip

Use the Premium plan (not Consumption) for latency-sensitive production workloads — it keeps pre-warmed instances ready and eliminates the cold-start penalty that Consumption plans incur after idle periods.

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