code: def test_box_coder_error(self):
      with self.static_graph():
          prior_box = paddle.static.data(
              name="prior_box", shape=[81, 4], dtype="int32"
          )
          prior_box_var = paddle.static.data(
              name="prior_box_var", shape=[81, 4], dtype="float32"
          )
          target_box = paddle.static.data(
              name="target_box", shape=[20, 81, 4], dtype="float32"
          )
  
          self.assertRaises(
              TypeError,
              ops.box_coder,
              prior_box,
              prior_box_var,
              target_box,
          )
  
      paddle.disable_static()
  
imports: from __future__ import print_function
  import os, sys
  import unittest
  import numpy
  import paddle
  import ppdet.modeling.ops
  from ppdet.modeling.tests.test_base import LayerTest
label_desc: Use image node_id 2 for calling the TestBoxCoder obj's underlying member method code with example usage: obj.test_box_coder_error() without return types