text: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  
  assert str(8) == '8'
  assert str([1, 2]) == '[1, 2]'
  assert str({1, 2}) == '{1, 2}'
  assert str({'a': 1, 'b': 2}) == "{'a': 1, 'b': 2}"
  assert str((1,)) == '(1,)'
  assert isinstance('ok', str)
  assert isinstance(list('ok'), list)
  assert isinstance(str(list('ok')), str)
  