版权
****

Python和这份文档的版权说明：

Copyright © 2001-2019 Python Software Foundation. All rights reserved.

Copyright © 2000 BeOpen.com. All rights reserved.

Copyright © 1995-2000 Corporation for National Research Initiatives.
All rights reserved.

Copyright © 1991-1995 Stichting Mathematisch Centrum. All rights
reserved.

======================================================================

更完整的版权信息，请参考 历史和许可证  。
