func_code: def overlap(x1=0, y1=0, r1=1, x2=0, y2=0, r2=1):
      rdistance = r1 + r2
      cdistance = ((x2 - x1) ** 2 + (y2 - y1) ** 2) ** 0.5
      if cdistance < rdistance:
          return True
      else:
          return False