efficient 2D data-plotting library - Python 3

 The guiqwt Python library provides efficient 2D data-plotting
 features (curve/image visualization and related tools) for
 signal/image processing application development and interactive
 computing. It's based on the scientific modules NumPy and SciPy, and
 the PyQwt plotting widgets for PyQt4 graphical user interfaces.
 .
 This is the Python 3 version of the package.