Vagrant sandbox now runs the latest YDK version 0.5.2. This sandbox is the simplest way to get started with YDK-Py. It provides an Ubuntu (16.04) VM with YDK-Py pre-installed and hundreds of sample applications. The sandbox is part of the ydk-py-samples repository. When running the sandbox, the "samples" and "projects" directories are shared between the host and the Vagrant box. Any changes to those directories are seen in both environments. Any other data in the Vagrant box is isolated from the host and will be lost if the Vagrant box is destroyed.
Give it a try!