from pylab import *
from matplotlib import style; style.use("classic")

# The slices will be ordered and plotted counter-clockwise.
labels = 'Frogs', 'Hogs', 'Dogs', 'Logs'
sizes = [15, 30, 45, 10]
colors = ['yellowgreen', 'gold', 'lightskyblue', 'lightcoral']
# only "explode" the 2nd slice (i.e. 'Hogs')
explode = (0, 0.1, 0, 0)

plt.pie(sizes, explode=explode, labels=labels, colors=colors,
        autopct='%1.1f%%', shadow=True, startangle=90,
        wedgeprops={'linewidth': 0},
        frame=True, center=(2, 2))

plt.pie(sizes[::-1], explode=explode, labels=labels, colors=colors,
        autopct='%1.1f%%', shadow=True, startangle=90,
        wedgeprops={'linewidth': 0},
        frame=True, center=(5, 2))

plt.pie(sizes, explode=explode[::-1], labels=labels, colors=colors,
        autopct='%1.1f%%', shadow=True, startangle=90,
        wedgeprops={'linewidth': 0},
        # The original test has center=(3, 5)
        frame=True, center=(3, 4.9))
# Set aspect ratio to be equal so that pie is drawn as a circle.
plt.axis('equal')

plt.show()