Merge branch 'cast3' of https://github.com/xadupre/tensorflow-onnx into input2

Author: sdpython

tf2onnx/graph.py

@@ -401,8 +401,8 @@ def maybe_cast_input(self, supported, type_map):
                 if tdtype is None:
                     raise RuntimeError("don't know how to cast type {} on node {}".format(dtype, name))
                 shape = self.graph.get_shape(name)
-                cast_node = self.graph.insert_new_node_on_input(self, "Cast", name)
-                cast_node.set_attr("to", tdtype)
+                cast_node = self.graph.insert_new_node_on_input(
+                    self, "Cast", name, to=tdtype)
                 self.graph.set_dtype(cast_node.output[0], [tdtype])
                 self.graph.set_shape(cast_node.output[0], shape)
                 did_cast = True