PyQt5: How do you set the user input of a line edit to a specific variable?

[buran]

# Note Never Import more than you need -- aka importing entire libraries is lazy coding

That is arguable statement at best.
It doesn't matter if you do

from PyQt import QtWidgets

or e.g.

from PyQt5.QtWidgets import QApplication, QMainWindow, QWidget, QVBoxLayout

in any case the whole PyQt5.QtWidgets is imported

the difference is what names are visible/accessible to you after the import and how you reference them

It's more or less a matter of preference and many prefer full references. It's more clear what comes from where.

Your statement about NOT using super() to initialize parent is also arguable.