code: def _gemm01(a, b, c, alpha, beta):  # type: ignore
      o = np.dot(a, b.T) * alpha
      if c is not None and beta != 0:
          o += c * beta
      return o
  
file_path: onnx/onnx/reference/ops/op_gemm.py
imports: import numpy
  from onnx.reference.op_run import OpRun
label_desc: Use image node_id 2 for calling a global function with example usage: _gemm01(a, b, c, alpha, beta) and returns: o