> "jeIlyfish" (with an upper case I) and "python3-dateutil" (not "dateutil").

Libraries should take lessons from writing safety critical code. If you identify libraries visually by name, the main problems are:

* easily misread characters like 1 (one) and l (lower case L), 0 and O, 2 and Z, 5 and S, or n and h.

* identifier names that differ only by on or few characters, especially if they are long.

It's possible to enforce a set rules that make identifier names are visually distinguishable and string distance measure to check all new libraries that are added against old names.