Does anybody know about module fillplots (http://fillplots.readthedocs.org)? I've successfully installed it but when I run some simple code from http://fillplots.readthedocs.org/en/latest/examples.html
from fillplots import plot_regions
plotter = plot_regions([
[(lambda x: x ** 2,), # x ^ 2 > 0 and
(lambda x: x + 5,)], # x + 5 > 0
])
nothing happens. How I can see that picture? The documentation of the package is quite poor, and I don't know what else I should do. Is there any other ways to plot the region that is the solution of a given system of inequalities?