With this the viewers under PyQt5 on Mac Sierra are sort-of working. The test main in each will start, show the window, do some drawing. But at some point in the commands fed to them, they crash. Need to try on some other system with Python 3.x (I know >= 3.3 from functions used, but only tested on 3.6 so far) and either PyQt4 or PyQt5.
With this the viewers under PyQt5 on Mac Sierra are sort-of working. The test main in each will start, show the window, do some drawing. But at some point in the commands fed to them, they crash. Need to try on some other system with Python 3.x (I know >= 3.3 from functions used, but only tested on 3.6 so far) and either PyQt4 or PyQt5.