About PyQt PyQt is one of the most popular Python bindings for the Qt cross-platform C++ framework. PyQt was developed by Riverbank Computing Limited. Qt itself is developed as part of the Qt Project. PyQt provides bindings for Qt 4 and Qt 5. PyQt is distributed under a choice of licences: GPL version 3 or a commercial license. PyQt is available in two editions: PyQt4 which will build against Qt 4