func_code: def overlap(x1=0, y1=0, r1=1, x2=0, y2=0, r2=1):
      dist = math.sqrt((x2 - x1) ** 2 + (y2 - y1) ** 2)
      radsum = (r1 + r2) ** 2
      raddif = (r1 - r2) ** 2
      if dist < radsum and dist > raddif:
          return True
      return False