code: def output_lines(output, encoding='utf-8', error_exc=None):
      
      if isinstance(output, ExecResult):
          exit_code, output = output
          if exit_code != 0 and error_exc is not None:
              raise error_exc(output.decode(encoding))
  
      return output.decode(encoding).splitlines()
docs: Convert bytestring container output or the result of a container exec
      command into a sequence of unicode lines.
  
      :param output:
          Container output bytes or an
          :class:`docker.models.containers.ExecResult` instance.
      :param encoding:
          The encoding to use when converting bytes to unicode
          (default ``utf-8``).
      :param error_exc:
          Optional exception to raise if ``output`` is an ``ExecResult`` with a
          nonzero exit code.
  
      :returns: list[str]