wxPython3 (Crossplatform GUI Toolkit)

wxPython is a GUI toolkit for the Python programming language.
It allows Python programmers to create programs with a robust,
highly functional graphical user interface simply and easily.  It is
implemented as a Python extension module (native code) that wraps the
popular wxWidgets cross platform GUI library which is written in C++.

Another optional dependency is libmspack, which is used by the CHM help
viewer.

wxPython is a port of wxWidgets and, as such, is compatible with other
ports like wxGTK.

NOTE:
wxPython3 can be installed alongside with wxPython, but it will
overwrite some files created by wxPython.

If you need to build packages using wxPython, simply reinstall wxPython
package and wx-config will point to correct version. The same solution
can be used if wxPython's wx-config is overwritten.

Optional dependency:
- To have webview support, install webkit2gtk before installing wxGTK3.