An overview of PyQt4 was presented at EuroPython An introduction to using PyQt4 with Qt Designer for the development of GUI applications was given at PyCon UK The book Rapid GUI Programming with Python and Qt is PyQt4-specific and covers development with Python , PyQt4 and Qt / Writing Qt Designer Plugins ¶ PyQt4’s QtDesigner module includes additional classes (all of which have a QPy prefix) PyQt4 installs a C++ plugin in Designer’s plugin directory. A Python custom widget may define new Qt signals using pyqtSignal (). A Python method may be defined as a new Qt. Designer is a graphical tool for building complex Qt4 GUI applications. In this post, I will use Designer to construct a simple GUI application, and in the following posts, I’ll use Python, matplotlib, and PyQt4 to add the necessary application logic to display an interactive data plot and a plot selection list.