Some programming languages recommend that your line length should be below a certain threshold. Python, for example, recommends that lines should not exceed 79 characters.
Vim has an option called colorcolumn that lets us highlight a particular common inside a buffer. This makes it easy to see when we’re spilling over the line length recommendations.
For Python, we’d want to enable it at column 80 — since everything beyond and including column 80 is undesirable. To do this, we can use the command :set colorcolumn=80.
Let’s try this in the editor. The editor is pre-populated with some Python code. Enable the colorcolumn option at line 80 and see which lines are spilling over the boundary.