code: def _run(self, size, output_datatype=None, periodic=None):  # type: ignore
      ni, N_1 = self._begin(size, periodic, output_datatype)
      alpha = 25.0 / 46.0
      beta = 1 - alpha
      res = alpha - np.cos(ni * np.pi * 2 / N_1) * beta
      return self._end(size, res, output_datatype)
  
imports: import numpy
  from onnx.reference.ops._op_common_window import _CommonWindow
label_desc: Use image node_id 1 for calling the HammingWindow obj's underlying member method code with example usage: obj._run(size, output_datatype, periodic) and returns: self