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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def load_config(json_path):
 """Load config info from a .json file and return it."""

  with open(json_path, 'r') as json_file:
    config = json.loads(json_file.read())
  # sanity-test the config:
  assert(config['tree'][0]['page'] == 'index')
  return config