Access official Python documentation via Unity Python Docs lens

Python is a "general-purpose, high-level programming language whose design philosophy emphasizes code readability, its syntax is said to be clear and expressive.Python has a large and comprehensive standard library".

Users interested in learning, mastering and/or improving Python are to usually acquire Python-related informations from books, online tutorials, etc, furthermore, the official documentation (located on http://docs.python.org/ ) offers a massive step-by-step documentation, carefully explaining and presenting topics ranging from What's new in Python 2.7? to Library Reference, Language Reference, Python HOWTOs, etc, and to more advanced subjects, such as Extending and Embedding, Python/C API, etc.

Unity Python Docs lens "links" the mentioned official documentation with the Dash, by populating the Dash with http://docs.python.org items, allowing users to easily search topics-of-interest directly from the Dash.

Accessing desired Python documentation's bits is as simple as opening the lens, typing a preferred word and clicking on the relevant searched&found item, action that will open it via the default web-browser.

How do we install Unity Python Docs lens 12.07?
Add the following PPA (Precise)

sudo add-apt-repository ppa:pablorubianes-uy/pythondoc

sudo apt-get update
sudo apt-get install pythondoc-lens

then, restart the computer.