Learning Python – Coding Style

Check out my new course Learn you some Lambda best practice for great good! and learn the best practices for performance, cost, security, resilience, observability and scalability.

  • Use 4-space indentation, no tabs

 

  • Wrap lines so that they don’t exceed 79 characters

 

  • Use blank lines to separate functions and classes, and larger blocks of code inside functions

 

  • When possible, put comments on a line of their own

 

  • Use docstrings

 

  • Use spaces around operators and after commas

 

  • Name your classes and functions consistently; the convention is to use CamelCase for classes and lower_case_with_underscores for functions and methods

 

  • Always use self as the name for the first method argument

 

  • Don’t use fancy encodings if your code is meant to be used in international environments

    Naming conventions:

    Variables / functions – use_lower_case_separated_by_underscore

    Class names – UseCamelCase

    Error classes end in Error, i.e. MyError

Liked this article? Support me on Patreon and get direct help from me via a private Slack channel or 1-2-1 mentoring.
Subscribe to my newsletter


Hi, I’m Yan. I’m an AWS Serverless Hero and the author of Production-Ready Serverless.

I specialise in rapidly transitioning teams to serverless and building production-ready services on AWS.

Are you struggling with serverless or need guidance on best practices? Do you want someone to review your architecture and help you avoid costly mistakes down the line? Whatever the case, I’m here to help.

Hire me.


Check out my new course, Learn you some Lambda best practice for great good! In this course, you will learn best practices for working with AWS Lambda in terms of performance, cost, security, scalability, resilience and observability. Enrol now and enjoy a special preorder price of £9.99 (~$13).

Start Learning


Are you working with Serverless and looking for expert training to level-up your skills? Or are you looking for a solid foundation to start from? Look no further, register for my Production-Ready Serverless workshop to learn how to build production-grade Serverless applications!

Find a workshop near you