So if I go into QtDesigner and build a UI, it'll be saved as a .ui file.  How can I make this as a python file or use this in python?
Using Anaconda3 (September 2018) and QT designer 5.9.5.
In QT designer, save your file as ui.
Open Anaconda prompt. Search for your file: cd C:.... (copy/paste the access path of your file).
Then write: pyuic5 -x helloworld.ui -o helloworld.py (helloworld = name of your file). Enter.
Launch Spyder. Open your file .py.
Linking a qtDesigner .ui file to python/pyqt?