python3-werkzeug 0.10.4+dfsg1-1ubuntu1.2 (i386 binary) in ubuntu xenial

 The Web Server Gateway Interface (WSGI) is a standard interface between web
 server software and web applications written in Python.
 .
 Werkzeug is a lightweight library for interfacing with WSGI. It features
 request and response objects, an interactive debugging system and a powerful
 URI dispatcher. Combine with your choice of third party libraries and
 middleware to easily create a custom application framework.