I started learning Python 3.4 and would like to start using libraries as well as Google App Engine, but the majority of Python
In the standard environment, vendoring was necessary to install third-party libraries. This task is not needed in the flexible environment as the runtime will automatically install dependencies declared in requirements.txt, including dependencies that require native extensions.
https://cloud.google.com/appengine/docs/flexible/python/migrating-an-existing-app#behavioral_differences