(This is now broken, sorry, please somebody fix, thanks.
The point may be the value of QTDIR in
   /usr/pkg/qt4/mkspecs/netbsd-g++/qmake.conf)

Import PyQwt-5.2.0 as wip/py-qwt.

PyQwt is a set of Python bindings for the Qwt C++ class
library which extends the Qt framework with widgets for
scientific and engineering applications. It provides a widget
to plot 2-dimensional data and various widgets to display and
control bounded or unbounded floating point values.
If $(QTDIR) in /usr/pkg/qt4/mkspecs/netbsd-g++/qmake.conf set to ${PREFIX}/qt4, this is packaged.
But now set as BROKEN, thanks