Amazon Web Services
docs.aws.amazon.com › aws lambda › developer guide › aws lambda functions › programming languages › building lambda functions with python
Building Lambda functions with Python - AWS Lambda
Run Python code in Lambda. Your code runs in an environment that includes the SDK for Python (Boto3) and credentials from an AWS Identity and Access Management (IAM) role that you manage.
Reddit
reddit.com › r/aws › so what does a well-made aws lambda in python actually look like?
r/aws on Reddit: So what does a well-made AWS Lambda in Python actually look like?
September 22, 2023 -
I've been losing myself in rewriting a bunch of lambda functions. I can't help but notice that there's a bunch of different opinions and philosophies that make up the bulk of the samples and documentation.
In my own team, one of the guys wrote his own test framework and schema validation library. Another wrote his own logging library and was a big fan of the Serverless framework. I've been using Lambda Power Tools and unittest myself but my lambdas are pretty vanilla. Three guys, three different development styles.
Everything feels so arbitrary and I'm not sure what actually constitutes a production-ready, well structured Python lambda.
FWIW We use terraform for initial project deployment with codebuild, and I have my own makefiles to deploy if I want to bother outside of it. Most of my lambdas are interfaced by AGW and interact with s3, dynamodb, and sagemaker.
Edit: to be clear - most of these are <200ms calls. I'm not trying to cram crazy things into a lambda. If anyone could share some code samples of some well-done Lambda's I'm happy.
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I've written probably 50 lambdas in Python at this point and to be honest keeping it simple is the best way. Follow PIP standards to keep your code readability high, use the paginator objects boto3 provides where possible and try to keep the execution time down.15 minutes is pretty high for something serverless so I tend to design my lambdas to perform a single task and then use something like AWS Step Functions to orchestrate several in a flow or in Map states (loops). I also make use of environment variables where possible and template a lot of functions for common things like assuming roles. I also make use of comprehension but don't go too overboard with that because it can reduce readability if you've got a fat one defined haha. No need to add comments every other line, just a single line docstring at the top of the function should be enough to describe it. There's also some neat docker commands out there to build all your packages into a single lambda layer using a requirements.txt, using the lambda image, and this should be possible to do with Terraform, or if you've only got one or two packages just prepare it in a CI/CD and use terraform to build and apply the layer.
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Utilise layers and be efficient with your code, everything else is superfluous.
AWS Lambda + Serverless Framework + Python — A Step By Step Tutorial — Part 2 “Using AWS KMS with Lambda to Store & Read Sensitive Data & Secrets”
You do not want to put your access key and secret key in your serverless.yml file. If you do then that file can never be part of a public repository and it becomes difficult to rotate those keys. It’s not necessary to include those keys either since the lambda is already executing with its own set of credentials. You can give access to the SSM parameter using iamRoleStatements.
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September 22, 2018AWS Lambda + Serverless Framework + Python – A Step by Step “Hello World”
I recommend this framework. I’ve used it in prod and had good results
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August 13, 2018AWS Lambda + Serverless Framework + Python – A Step by Step “Hello World”
Looks great! I'm going to give it a crack later today.
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August 14, 2018Python & AWS Lambda - Serverless Tram Time Display
The Python here is pretty straightforward and could almost certainly be improved and optimized, but it was my first time deploying a web-app via AWS Lambda so thought this may be a useful write-up for anyone else looking to do the same
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December 29, 2018How to create AWS Lambda functions in Python - YouTube
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AWS with Python: Mastering Lambda Basics - YouTube
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Intro to AWS Lambda with Python | AWS Lambda Python Tutorial - YouTube
How to Build an AWS Lambda Function in Python in 10 Minutes!
Amazon Web Services
docs.aws.amazon.com › aws lambda › developer guide › aws lambda functions › programming languages › building lambda functions with python › define lambda function handler in python
Define Lambda function handler in Python - AWS Lambda
The Lambda function handler is the method in your Python code that processes events. When your function is invoked, Lambda runs the handler method.
SentinelOne
sentinelone.com › blog › data platform › aws python lambda guide
AWS Python Lambda Guide
April 13, 2024 - We’ll point an API to our Lambda function. Before we do this, we’ll need to go back to the IAM section in the AWS Console and give our user access to AmazonAPIGatewayAdministrator (to create the API Gateway) and AmazonAPIGatewayInvokeFullAccess (to invoke the endpoint): Now that the Serverless framework can also configure the API Gateway service, we can add a trigger to our serverless.yml: service: email-validator provider: name: aws runtime: python3.8 functions: main: handler: handler.validate events: - http: POST /email/validate
AWS
aws.amazon.com › blogs › compute › python-3-14-runtime-now-available-in-aws-lambda
Python 3.14 runtime now available in AWS Lambda | Amazon Web Services
November 19, 2025 - AWS Lambda now supports Python 3.14 as both a managed runtime and container base image. Python is a popular language for building serverless applications. Developers can now take advantage of new features and enhancements when creating serverless applications on Lambda.
Amazon Web Services
docs.aws.amazon.com › aws lambda › developer guide › aws lambda functions › lambda runtimes
Lambda runtimes - AWS Lambda
1 month ago - For functions with more complex ... in the Lambda handler. Choice of runtime is also influenced by developer preference and language familiarity. Each major programming language release has a separate runtime, with a unique runtime identifier, such as nodejs24.x or python3.14. To configure a function to use a new major language version, you need to change the runtime identifier. Since AWS Lambda cannot ...
AWS
aws.amazon.com › about-aws › whats-new › 2025 › 11 › aws-lambda-python-314
AWS Lambda adds support for Python 3.14 - AWS
Discover more about what's new at AWS with AWS Lambda adds support for Python 3.14
Amazon Web Services
docs.aws.amazon.com › aws lambda › developer guide › aws lambda functions › programming languages › building lambda functions with python › working with .zip file archives for python lambda functions
Working with .zip file archives for Python Lambda functions - AWS Lambda
Learn how to deploy Python Lambda function code using a .zip file deployment package.
TheServerSide
theserverside.com › blog › Coffee-Talk-Java-News-Stories-and-Opinions › create-python-aws-lambda-function-hello-world-tutorial-serverless-how-to-example
Create your first Python AWS Lambda function in minutes
Log into the AWS console and navigate to the Lambda dashboard. Click the orange Create Function button. Specify the function’s name and the Python version (Python 3.10 is recommended).
Published: September 22, 2025
GitHub
github.com › grantcooksey › aws-lambda-python-examples
GitHub - grantcooksey/aws-lambda-python-examples: Lessons and examples to get started using aws lambda function in python · GitHub
This repo serves as a starting point for building reliable aws lambda functions in python.
Author: grantcooksey
Adam the Automator
adamtheautomator.com › aws-lambda-python
Build AWS Lambda Python Functions from Scratch
October 1, 2023 - Running code based on a response or event – You can schedule code to run at any given time and as many times as you want based on nearly any AWS event. You no longer have to run scripts ad-hoc. You don’t need an operating system to run the code on – With serverless functions, you don’t need to set up an environment to run code on. That means you don’t have to set up networking, virtual machines, storage, etc. You just have a place to run code. Run almost any type of code – Lambda is compatible with Python, Node.JS, Ruby, Go, Java, C#, and even PowerShell.
Amazon Web Services
docs.aws.amazon.com › aws lambda › developer guide › aws lambda functions › programming languages › building lambda functions with python › instrumenting python code in aws lambda
Instrumenting Python code in AWS Lambda - AWS Lambda
Learn how to instrument Python Lambda functions using X-Ray tracing.
Amazon Web Services
docs.aws.amazon.com › aws lambda › developer guide › aws lambda functions › programming languages › building lambda functions with python › deploy python lambda functions with container images
Deploy Python Lambda functions with container images - AWS Lambda
Deploy your Python Lambda function code as a container image using an AWS provided base image or the runtime interface client.
AWS
docs.aws.amazon.com › cdk › api › v2 › python › aws_cdk.aws_lambda.html
aws_cdk.aws_lambda — AWS Cloud Development Kit 2.268.0 documentation
API Reference · aws_cdk.aws_lambda · aws_cdk.aws_lambda · Package Overview · Previous Next · © Copyright 2026, Amazon Web Services · Built with Sphinx using a theme provided by Read the Docs
Amazon Web Services
docs.aws.amazon.com › aws lambda › developer guide › aws lambda functions › programming languages › building lambda functions with python › aws lambda function testing in python
AWS Lambda function testing in Python - AWS Lambda
Learn how to test serverless functions written in Python.
Stackify
stackify.com › aws-lambda-with-python-a-complete-getting-started-guide
AWS Lambda with Python: A Complete Getting Started Guide - Stackify
May 16, 2024 - In this post, we’ll learn what Amazon Web Services (AWS) Lambda is, and why it might be a good idea to use for your next project. For a more in-depth introduction to serverless and Lambda, read AWS Lambda: Your Quick Start Guide to Going Serverless. In order to show how useful Lambda can be, we’ll walk through creating a simple Lambda function using the Python programming language.
Amazon Web Services
docs.aws.amazon.com › aws lambda › developer guide › aws lambda functions › programming languages › building lambda functions with python › working with layers for python lambda functions
Working with layers for Python Lambda functions - AWS Lambda
Learn how to package and create a Python Lambda layer.
Dash0
dash0.com › home › guides › ultimate aws lambda python tutorial with boto3
Ultimate AWS Lambda Python Tutorial with Boto3 · Dash0
July 20, 2026 - Lambda containers are extremely short-lived and are regularly recycled for use elsewhere in the system. This means you cannot debug your application based on operating system aspects, such as local file storage, unless you ensure the function context doesn't exist. To make integration easy with AWS services for the Python language, AWS has come up with an SDK called boto3.
AWS
aws.amazon.com › blogs › compute › python-3-13-runtime-now-available-in-aws-lambda
Python 3.13 runtime now available in AWS Lambda | Amazon Web Services
November 14, 2024 - This post is written by Julian Wood, Principal Developer Advocate, and Leandro Cavalcante Damascena, Senior Solutions Architect Engineer. AWS Lambda now supports Python 3.13 as both a managed runtime and container base image. Python is a popular language for building serverless applications.
AWS
docs.aws.amazon.com › aws sdk code examples › code library › code examples by sdk using aws sdks › code examples for sdk for python (boto3) › lambda examples using sdk for python (boto3)
Lambda examples using SDK for Python (Boto3) - AWS SDK Code Examples
Code examples that show how to use AWS SDK for Python (Boto3) with Lambda.