code: def load_file(file_path):
          
          log.debug('read data from {0}'.format(file_path))
          if os.path.exists(file_path):
              with open(file_path) as f:
                  json_data = json.load(f)
  
              tf_state = Tfstate(json_data)
              tf_state.tfstate_file = file_path
              return tf_state
  
          log.debug('{0} is not exist'.format(file_path))
  
          return Tfstate()
docs: Read the tfstate file and load its contents, parses then as JSON and put the result into the object