func_code: _A = None
  
  
  def overlap(x1=_A, y1=_A, r1=_A, x2=_A, y2=_A, r2=_A):
      if x1 is _A:
          x1 = 0
      elif y1 is _A:
          y1 = 0
      elif r1 is _A:
          r1 = 1
      if (x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2) < (r1 + r2) * (r1 + r2):
          return True
      else:
          return False