如何用pyrren-python修复runtimewarning以阻止代码执行？

Question

我正在用pyrren构建LM Ann

#gradient
g = np.dot(J.transpose(),e)
#calculate scaled inverse hessian
try:
  G = np.linalg.inv(JJ+dampfac*np.eye(net['N']))
  #scaled inverse hessian except np.linalg.LinAlgError:
  # Not invertible. Go small step in gradient direction
  w_delta = 1.0/1e10 * g
else:
  # calculate weight modification
  w_delta = np.dot(-G,g)

但我有时会收到这样的警告

/usr/local/lib/python3.6/dist-packages/pyrenn.py:722: RuntimeWarning: invalid value encountered in multiply   G = np.linalg.inv(JJ+dampfac*np.eye(net['N'])) #scaled inverse hessian .

有人知道我该怎么处理吗？ 每当我碰到这个程序就卡住了