Please note: The FORMS library, to which the fl module described above interfaces, is a simpler and more accessible user interface library for use with GL than the Panel Module (besides also being by a Dutch author).
This module should be used instead of the built-in module pnl to interface with the Panel Library.
The module is too large to document here in its entirety. One interesting function:
Warning: the Python interpreter will dump core if you don't create a GL window before calling panel.mkpanel() or panel.defpanellist().