Serverless Python with AWS Lambda

1. Introduction

AWS Lambda is a serverless compute service that lets you run code without provisioning or managing servers. You can execute your Python code in response to events such as HTTP requests, file uploads, or messages in a queue.

2. Key Concepts

3. Setup

1. Log in to the AWS Management Console.
2. Navigate to the Lambda service.
3. Click on "Create function".
4. Choose "Author from scratch".
5. Configure the function:
   • Function name: my_lambda_function
   • Runtime: Python 3.x
6. Click "Create function".

4. Code Example

The following is a simple example of a Lambda function that returns a greeting message.

import json

def lambda_handler(event, context):
    return {
        'statusCode': 200,
        'body': json.dumps('Hello from AWS Lambda!')
    }

5. Best Practices

• Keep functions small and focused on a single task.
• Use environment variables for configuration.
• Monitor and log function executions using CloudWatch.
• Handle errors gracefully and implement retries where necessary.

6. FAQ