import math as m
import matplotlib.pyplot as l
c="3,1,1 3,2,1.5 1,2,0.7 0.9,1.2,1.2 1,0,0.8"
a=[[float(y) for y in x.split(",")] for x in c.split(" ")]
for a2 in a:
 for x in xrange(0,200):
  q=x*m.pi/100.;p=(a2[0]+m.sin(q)*a2[2],a2[1]+m.cos(q)*a2[2]);cc=[]
  for z in a:
   if z != a2:
    if ((z[0]-p[0])**2+(z[1]-p[1])**2)<(z[2]**2):cc.append(z)
    if not cc:l.scatter(p[0],p[1])
l.show()