From the PyQt4 website their instructions for installing the package are to download the tarball and use the config file. I have two versions of Python, one is my normal sys
For windows users, there is an easy fix. Download whl files from:
https://www.lfd.uci.edu/~gohlke/pythonlibs/#pyqt4
run from anaconda prompt pip install PyQt4‑4.11.4‑cp37‑cp37m‑win_amd64.whl