Minimal Python 2 & 3 shim around all Qt bindings - PySide, PySide2, PyQt4 and PyQt5.
copied from cf-post-staging / qt.pyconda install conda-forge::qt.pyconda install conda-forge/label/cf201901::qt.pyconda install conda-forge/label/cf202003::qt.pyconda install conda-forge/label/gcc7::qt.py