deal with comments

x2paddle/op_mapper/onnx2paddle/opset9/opset.py

@@ -462,6 +462,7 @@ class OpSet9():
         val_x = self.graph.get_input_node(node, idx=0, copy=True)
         axis = self.graph.get_input_node(node, idx=1, copy=True)
         axis_values = _const_weight_or_none(axis)
+        assert axis_values is not None, 'Axis only support constant tensor!'
         layer_attrs = {'axis': axis_values}
         self.paddle_graph.add_layer(
             'paddle.cumsum',
@@ -740,6 +741,7 @@ class OpSet9():
         axes = node.get_attr('axes')
         if axes is None:
             axes = self.graph.get_input_node(node, idx=1, copy=True)
+            axes = _const_weight_or_none(axes)
         if len(val_x.out_shapes[0]) == 0 and len(axes) == 1 and axes[0] == 0:
             if node.name:
                 self.paddle_graph.add_layer(
@@ -1709,7 +1711,8 @@ class OpSet9():
         x_shape = val_x.out_shapes[0]
         y_shape = val_y.out_shapes[0]
         inputs_dict = {"x": val_x.name, "y": val_y.name}
-        if y_shape[0] == 1 and x_shape[-1] != 1 and x_shape[0] != 1:
+        if len(y_shape) != 0 and y_shape[0] == 1 and len(
+                x_shape) != 0 and x_shape[-1] != 1 and x_shape[0] != 1:
             y_squeeze = val_y.name + '_squeeze'
             self.paddle_graph.add_layer(
                 "paddle.squeeze",