For us, we follow a very tight convention around how we write code. This has helped us in maintaining the codebase. Of-course some tools help a lot too: - We u

For us, we follow a very tight convention around how we write code. This has helped us in maintaining the codebase. Of-course some tools help a lot too: - We use standard tools like flake8, isort, black for code linting. - We are not following TDD, but we do write tests for all features. Pytest helps here - Proper code reviews. I cannot stress this enough. As a Tech-Lead I have pushed for code reviews even when working on (supposedly) tight deadlines. - We are also exploring to use type hints introduced in Python3.7. PS Shout-out to Poetry(https://poetry.eustace.io/ https://poetry.eustace.io/) to make our dependency management easier than ever. Updating third party libs is a lot easier now.