I'm using matplotlib-venn to create a Venn diagram that contains three subsets, one of which contains the other two (and these other two intersect each other).
venn3(subsets=(17, 29, 40, 154, 17, 29, 40), set_labels = ('A', 'B','C'), ax=axes)
C contains both A and B, and I'd like to selectively show only some of the values.