首先需要安裝onnx和onnx-tf這兩個包静秆，用pip安裝就行
import onnx
from onnx_tf.backend import prepare
def onnx2pb(onnx_input_path, pb_output_path):
onnx_model = onnx.load(onnx_input_path) # load onnx model
tf_exp = prepare(onnx_model) # prepare tf representation
tf_exp.export_graph(pb_output_path) # export the model
if __name__ == "__main__":
onnx_input_path = '../onnx/model.onnx'
pb_output_path = '../tensorflow/model.pb'
onnx2pb(onnx_input_path, pb_output_path)
