code: def test_baseline_id(self):
      self.assertDictEqual(
          {"baseline_id": "a_1"},
          submissions.participant_from_submission_path(
              "path/baseline_a_1.zip"
          ),
      )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import unittest
  from six import assertCountEqual
  from eval_lib import submissions
  from eval_lib.tests import fake_cloud_client
label_desc: Use image node_id 2 for calling the ParticipantFromSubmissionPathTest obj's underlying member method code with example usage: obj.test_baseline_id() without return types