APPENDIX D COPYRIGHT See History and License for complete license and permissions information. 139 Python and this documentation is: Copyright © 2001-2021 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.