Ya Jupyter works fine, so it’s definitely isolated to Spyder. I don’t see pyqt on pip list…there’s a QtPy? 1.4.1? Doesn’t sound like what you’re after. I’ll install it. I found I could import PyQt 5 from command line python. Which version…ok. So I searched and found two slightly different versions of 5.9 (35 and 36, for python 3.5 and 3.6) in anaconda3/pkgs, as well as two of 5.6. I deleted the two 5.9 and restarted conda navigator, but…same problem. I downloaded a fresh version of 5.6 and deleted the other two and…same problem.