In this tutorial, I explain how to define custom Python packages. This is the first part of a series in which I explain how to create Python projects, write unit tests, then host projects in Azure DevOps (former VSTS). Next tutorials: * Writing unit tests for Python projects: https://www.youtube.com/watch?v=pbV8i8HHpGU * Using Azure DevOps for Python projects: https://www.youtube.com/watch?v=sa3fuhl1pCE 🔴 New tutorials, using GitHub instead of Azure DevOps: * https://www.youtube.com/watch?v=YXcXIr835mw Examples of setup files and project structures can be found in my GitHub accounts: * https://github.com/RobertoPrevato/FooDemo * https://github.com/Neoteroi (contains several repositories using a similar CI/CD approach) * https://github.com/Neoteroi/essentials-configuration (example using PEP 420)