code: def test_parse_cli_string(self):
      cli_string = "lightly-magic trainer.max_epochs=3"
      self.parse_cli_string(cli_string)
      self.assertEqual(self.cfg["trainer"]["max_epochs"], 3)
  
file_path: lightly/tests/cli/test_cli_magic.py
imports: import os
  import re
  import sys
  import tempfile
  import torchvision
  from hydra.experimental import compose, initialize
  from lightly import cli
  from tests.api_workflow.mocked_api_workflow_client import N_FILES_ON_SERVER, MockedApiWorkflowClient, MockedApiWorkflowSetup
label_desc: Use image node_id 4 for calling the TestCLIMagic obj's underlying member method code with example usage: obj.test_parse_cli_string() without return types