The YDK-Py Vagrant sandbox now runs the latest version 0.5.4. If you want to use it and are a newcomer, clone the ydk-py-samples repository:
$ git clone https://github.com/CiscoDevNet/ydk-py-samples.git
That repository provides over 500 samples apps and includes the Vagrant file.
If you have used the sandbox in the past, upgrade your sandbox:
$ vagrant box update
To start you're sandbox, execute
$ vagrant up
Then connect to your sandbox using:
$ vagrant ssh
Remember, the samples and projects directory and shared between your sandbox and your host. Given that YDK-Py installation is now dramatically simpler, this sandbox may become less relevant over time. In the future, we expect sandbox users to manually upgrade the sandbox using the YDK-Py quick install instructions.
Enjoy!