Binary package “python3-polib” in ubuntu xenial

Python 3 library to parse and manage gettext catalogs

 polib allows you to manipulate, create, modify gettext files
 (pot, po and mo files). You can load existing files, iterate
 through it's entries, add, modify entries, comments or metadata,
 etc... or create new po files from scratch.
 This package installs the library for Python 3.