Library to plot regions and boundaries given inequalities?


Are there any library which can plot regions and boundaries given
inequalities, using matplotlib? Inequality can be given as sympy
inequality object, function or data points. Matplotlib has functions
to fill regions but they are too primitive for my needs. I will
create my own library to do that using matplotlib if there is nothing
like that, but I thought I'd check it first. Also, if you have other
forums I better post this question, please let me know (StackOverflow