The following code produces the required figure by plotting 20 Circle patches (with transparency set to 0.1) with their centres evenly spaced on the circumference of a circle of the same radius.
import numpy as np
import matplotlib.pyplot as plt
from matplotlib.patches import Circle
n = 20
r = 100
fig = plt.figure()
ax = fig.add_subplot(111, aspect='equal')
circles = [Circle((r * np.sin(phi), r * np.cos(phi)), r, fc='b', alpha=0.1)
for phi in np.arange(0, 2*np.pi, 2*np.pi/n)]
for circle in circles:
ax.add_artist(circle)
ax.set_xlim(-2*r,2*r)
ax.set_ylim(-2*r,2*r)
ax.xaxis.set_visible(False)
ax.yaxis.set_visible(False)
plt.show()