code: def _f_tanh(self, x):  # type: ignore
      return np.tanh(x)
  
file_path: onnx/onnx/reference/ops/op_rnn.py
imports: import numpy
  from onnx.reference.op_run import OpRun
label_desc: Use image node_id 3 for calling the CommonRNN obj's underlying member method code with example usage: obj._f_tanh(x) and returns: np