class_docstr: Test case of dag info 
class_docstr_tok: ["Test","case","of","dag","info"]
docstr: Unittest dag info
  
  example of dag info
  {
      '89be9ec1': {
          'op': 'map',
          'op_name': 'towhee/image-decode',
          'is_stream': True,
          'init_args': {},
          'call_args': {
              '*arg': ( < towhee.engine.factory._OperatorLazyWrapper object at 0x13faba040 > , ),
              '*kws': {}
          },
          'op_config': {
              'chunksize': None,
              'jit': None,
              'format_priority': ['onnx'],
              'ac': '123',
              'asd': 'wea'
          },
          'input_info': [
              []
          ],
          'output_info': ['img'],
          'parent_ids': [],
          'child_ids': ['end'],
          'dc_sequence': ['start', '89be9ec1', 'end']
      },
      'end': {
          'op': 'end',
          'op_name': 'end',
          'init_args': None,
          'call_args': None,
          'op_config': None,
          'input_info': None,
          'output_info': None,
          'parent_ids': ['89be9ec1'],
          'child_ids': []
      },
      'start': {
          'op': 'stream',
          'op_name': 'dummy_input',
          'is_stream': False,
          'init_args': None,
          'call_args': {
              '*arg': (),
              '*kws': {}
          },
          'op_config': {
              'parallel': None,
              'chunksize': None,
              'jit': None,
              'format_priority': None
          },
          'input_info': None,
          'output_info': None,
          'parent_ids': [],
          'child_ids': [],
          'dc_sequence': ['start', '89be9ec1', 'end']
      }
  }
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code: def test_image_decode_clip_dag_information(self):
      """
      Unittest dag info
  
      example of dag info
      {
          '89be9ec1': {
              'op': 'map',
              'op_name': 'towhee/image-decode',
              'is_stream': True,
              'init_args': {},
              'call_args': {
                  '*arg': ( < towhee.engine.factory._OperatorLazyWrapper object at 0x13faba040 > , ),
                  '*kws': {}
              },
              'op_config': {
                  'chunksize': None,
                  'jit': None,
                  'format_priority': ['onnx'],
                  'ac': '123',
                  'asd': 'wea'
              },
              'input_info': [
                  []
              ],
              'output_info': ['img'],
              'parent_ids': [],
              'child_ids': ['end'],
              'dc_sequence': ['start', '89be9ec1', 'end']
          },
          'end': {
              'op': 'end',
              'op_name': 'end',
              'init_args': None,
              'call_args': None,
              'op_config': None,
              'input_info': None,
              'output_info': None,
              'parent_ids': ['89be9ec1'],
              'child_ids': []
          },
          'start': {
              'op': 'stream',
              'op_name': 'dummy_input',
              'is_stream': False,
              'init_args': None,
              'call_args': {
                  '*arg': (),
                  '*kws': {}
              },
              'op_config': {
                  'parallel': None,
                  'chunksize': None,
                  'jit': None,
                  'format_priority': None
              },
              'input_info': None,
              'output_info': None,
              'parent_ids': [],
              'child_ids': [],
              'dc_sequence': ['start', '89be9ec1', 'end']
          }
      }
      """
      dc = (
          towhee.dummy_input()
          .image_decode["path", "img"](
              op_config={
                  "ac": "123",
                  "asd": "wea",
                  "format_priority": ["onnx"],
              }
          )
          .set_jit("numba")
          .as_function()
      )
  
      a = dc.dag_info["end"]["parent_ids"][0]
      self.assertEqual(dc.dag_info[a]["op_name"], "towhee/image-decode")
  
      for key, val in dc.dag_info.items():
          if val["op"] == "stream":
              self.assertEqual(val["op_name"], "dummy_input")
          if key == "start":
              expect = 3
              self.assertEqual(len(val["dc_sequence"]), expect)
  
      expect_no_config = {
          "parallel": None,
          "chunksize": None,
          "jit": None,
          "format_priority": None,
      }
      for i in dc.dag_info.values():
          if i["op_name"] == "towhee/image-decode":
              self.assertEqual(
                  i["op_config"]["format_priority"], ["onnx"]
              )
              self.assertEqual(i["op_config"]["ac"], "123")
              self.assertEqual(i["op_config"]["asd"], "wea")
          elif i["op_name"] == "dummy_input":
              self.assertEqual(i["op_config"], expect_no_config)
          elif i["op_name"] == "end":
              self.assertEqual(i["op_config"], None)
          else:
              self.assertEqual(i["op_config"]["format_priority"], None)
  
      expect_input = "path"
      expect_output = ["img"]
      for j in dc.dag_info.values():
          if j["op_name"] == "towhee/clip":
              self.assertEqual(j["input_info"][0][1], expect_input)
              self.assertEqual(j["output_info"], expect_output)
  
imports: import towhee
  import unittest
label_desc: Use image node_id 1 for calling the TestDagInfo obj's underlying member method code with example usage: obj.test_image_decode_clip_dag_information() without return types