import onnx
import onnx.parser

model = """
<
   ir_version: 10,
   opset_import: ["" : 6]
>
graph (double[2,1] in0, double in1, double[2] in2) => () {
   out0 = Gemm <alpha: float = 1, beta: float = -693.752, broadcast: int = -436, transB: int = 823> (in0, in1, in2)
}
"""

onnx.shape_inference.infer_shapes(onnx.parser.parse_model(model))