Vennpi is an add-on to matplotlib-venn that plots markers onto a Venn diagram to indicate how different slices of each Venn diagram chunk are organized like a connected series of non-circular pie plots.
It was originally developed to compare HOMER annotated peaks where the Venn diagram would show the overlap between peaks and the pie charts would break down the annotations within some slice of a peak set.
from matplotlib_venn import venn2
from _venn_pie import pie2
markers=["*","+"]
venn2_dict = {}
# A
venn2_dict["01"]={"*":0.5,"+":0.5}
# B
venn2_dict["10"]={"*":0.75,"+":0.25}
# AB
venn2_dict["11"]={"*":0.33,"+":0.67}
venn2(subsets = (sumA, sumB, sumAB), ax = ax, set_labels = ("A", "B"))
pie2((sumA, sumB, sumAB), ax, venn2_dict, markers)In the example, I used pybedtools to read in the peaks after reformating HOMER's output from annotatePeaks.pl with awk (commands shown below)
awk 'FNR > 1 {print $2"\t"$3"\t"$4"\t"$8"\t"$6"\t"$5}' peaksA.bed.anno > peaksA.bed
awk 'FNR > 1 {print $2"\t"$3"\t"$4"\t"$8"\t"$6"\t"$5}' peaksB.bed.anno > peaksB.bed
