$ sudo apt-get update
$ sudo apt-get install python-pastewebkit 

python-pastewebkit is installed in your system.

Make ensure the python-pastewebkit package were installed using the commands given below,

$ sudo dpkg-query -l | grep python-pastewebkit *

You will get with python-pastewebkit package name, version, architecture and description in a table

python-pastewebkit package basic information: