import matplotlib
matplotlib.use("TkAgg")

from matplotlib import pyplot

#1. Prepare data

labels = ["iOs", "Android", "Web", "React Native"]
values = [15,15,40,30]
colors = ["xkcd:lavender","red","blue","gold"]
explode = [0, 0, 0 , 0.2]

#2. Plot
pyplot.pie(values,
            labels = labels, 
            colors = colors,
            explode= explode)
pyplot.axis('equal')

#3. Show

pyplot.show()