LinkedIn has a similar open source project that is much more mature. It builds on Gradle features to manage complex dependencies and build Python artifacts. If you include this LinkedIn Gradle Plugin [1] you can automatically run tests in a virtual env and source a file to enter the project's virtual env.

PyGradle [2]: "The PyGradle build system is a set of Gradle plugins that can be used to build Python artifacts"

[1] https://github.com/linkedin/pygradle/blob/01d079e2b53bf9933a...

[2] https://github.com/linkedin/pygradle