webapp2 vs Yii: What are the differences?
webapp2: Lightweight Python web framework compatible with Google App Engine’s webapp. webapp2 is a simple. it follows the simplicity of webapp, but improves it in some ways: it adds better URI routing and exception handling, a full featured response object and a more flexible dispatching mechanism; Yii: A high-performance PHP framework best for developing Web 2.0 applications. Yii comes with: MVC, DAO/ActiveRecord, I18N/L10N, caching, authentication and role-based access control, scaffolding, testing, etc. It can reduce your development time significantly.
webapp2 and Yii belong to "Frameworks (Full Stack)" category of the tech stack.
Yii is an open source tool with 4.86K GitHub stars and 2.22K GitHub forks. Here's a link to Yii's open source repository on GitHub.