AnyQt ----- PyQt4/PyQt5 compatibility layer. Features: * At the top level AnyQt exports a Qt5 compatible module namespace along with some minimal renames to better support portability between different versions * Which Qt api/backend is chosen can be controlled by a QT_API env variable * The api can be chosen/forced programmatically (as long as no PyQt4/PyQt5/PySide was already imported) * provides an optional compatibility import hook, that denys imports from conflicting Qt api, or intercepts and fakes a Qt4 api imports, to use a Qt5 compatible API (some monkey patching is involved).