How to disentangle a list of lists in Python

An example of a .screenrc file with Vim-like navigation and widnow resizing

How to build GNU Screen on macOS

You can make bold latin letters in LaTeX. How about bold Greek letters and symbols? 

Building Vim on macOS from source, with Anaconda Python 3. 

For most file operations usually you use the os library. This leads to repeating and lengthy code. But pathlib offers a really convenient alternative.

Count the items that an interator has, without storing all items in memory.