When working with JVM languages a pattern commonly followed is to use a build system (ant+ivy / maven / gradle), where using a build file, the dependencies of your code can be defined. The build system is able to fetch these dependencies when you build your code. Moreover IDEs like Eclipse/IntelliJ are also able to read these build files and continuously build/verify your code as you write it.
How is something similar done while developing in Python? While there may not necessarily be a build step, I want a developer to be able to checkout my code and then run a single bootstrap command that will setup a virtualenv and pull in any thirdy-party dependencies necessary to run the code. I could include some sort of a script to do this, but I am wondering if there is a tool to do this? Most of my search so far has led me to packaging tools, which are more for distribution to end-user than for this purpose (or so I understand).
This is managed by virtualenv and the pip install -r requirements.txt command. More info here: Virtual Environments