|  | A. HISTORY OF THE SOFTWARE | 
						
						
							|  | ========================== | 
						
						
							|  | 
 | 
						
						
							|  | Python was created in the early 1990s by Guido van Rossum at Stichting | 
						
						
							|  | Mathematisch Centrum (CWI, see http://www.cwi.nl) in the Netherlands | 
						
						
							|  | as a successor of a language called ABC.  Guido remains Python's | 
						
						
							|  | principal author, although it includes many contributions from others. | 
						
						
							|  | 
 | 
						
						
							|  | In 1995, Guido continued his work on Python at the Corporation for | 
						
						
							|  | National Research Initiatives (CNRI, see http://www.cnri.reston.va.us) | 
						
						
							|  | in Reston, Virginia where he released several versions of the | 
						
						
							|  | software. | 
						
						
							|  | 
 | 
						
						
							|  | In May 2000, Guido and the Python core development team moved to | 
						
						
							|  | BeOpen.com to form the BeOpen PythonLabs team.  In October of the same | 
						
						
							|  | year, the PythonLabs team moved to Digital Creations, which became | 
						
						
							|  | Zope Corporation.  In 2001, the Python Software Foundation (PSF, see | 
						
						
							|  | https://www.python.org/psf/) was formed, a non-profit organization | 
						
						
							|  | created specifically to own Python-related Intellectual Property. | 
						
						
							|  | Zope Corporation was a sponsoring member of the PSF. | 
						
						
							|  | 
 | 
						
						
							|  | All Python releases are Open Source (see http://www.opensource.org for | 
						
						
							|  | the Open Source Definition).  Historically, most, but not all, Python | 
						
						
							|  | releases have also been GPL-compatible; the table below summarizes | 
						
						
							|  | the various releases. | 
						
						
							|  | 
 | 
						
						
							|  |     Release         Derived     Year        Owner       GPL- | 
						
						
							|  |                     from                                compatible? (1) | 
						
						
							|  | 
 | 
						
						
							|  |     0.9.0 thru 1.2              1991-1995   CWI         yes | 
						
						
							|  |     1.3 thru 1.5.2  1.2         1995-1999   CNRI        yes | 
						
						
							|  |     1.6             1.5.2       2000        CNRI        no | 
						
						
							|  |     2.0             1.6         2000        BeOpen.com  no | 
						
						
							|  |     1.6.1           1.6         2001        CNRI        yes (2) | 
						
						
							|  |     2.1             2.0+1.6.1   2001        PSF         no | 
						
						
							|  |     2.0.1           2.0+1.6.1   2001        PSF         yes | 
						
						
							|  |     2.1.1           2.1+2.0.1   2001        PSF         yes | 
						
						
							|  |     2.1.2           2.1.1       2002        PSF         yes | 
						
						
							|  |     2.1.3           2.1.2       2002        PSF         yes | 
						
						
							|  |     2.2 and above   2.1.1       2001-now    PSF         yes | 
						
						
							|  | 
 | 
						
						
							|  | Footnotes: | 
						
						
							|  | 
 | 
						
						
							|  | (1) GPL-compatible doesn't mean that we're distributing Python under | 
						
						
							|  |     the GPL.  All Python licenses, unlike the GPL, let you distribute | 
						
						
							|  |     a modified version without making your changes open source.  The | 
						
						
							|  |     GPL-compatible licenses make it possible to combine Python with | 
						
						
							|  |     other software that is released under the GPL; the others don't. | 
						
						
							|  | 
 | 
						
						
							|  | (2) According to Richard Stallman, 1.6.1 is not GPL-compatible, | 
						
						
							|  |     because its license has a choice of law clause.  According to | 
						
						
							|  |     CNRI, however, Stallman's lawyer has told CNRI's lawyer that 1.6.1 | 
						
						
							|  |     is "not incompatible" with the GPL. | 
						
						
							|  | 
 | 
						
						
							|  | Thanks to the many outside volunteers who have worked under Guido's | 
						
						
							|  | direction to make these releases possible. | 
						
						
							|  | 
 | 
						
						
							|  | 
 | 
						
						
							|  | B. TERMS AND CONDITIONS FOR ACCESSING OR OTHERWISE USING PYTHON | 
						
						
							|  | =============================================================== | 
						
						
							|  | 
 | 
						
						
							|  | PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2 | 
						
						
							|  | -------------------------------------------- | 
						
						
							|  | 
 | 
						
						
							|  | 1. This LICENSE AGREEMENT is between the Python Software Foundation | 
						
						
							|  | ("PSF"), and the Individual or Organization ("Licensee") accessing and | 
						
						
							|  | otherwise using this software ("Python") in source or binary form and | 
						
						
							|  | its associated documentation. | 
						
						
							|  | 
 | 
						
						
							|  | 2. Subject to the terms and conditions of this License Agreement, PSF hereby | 
						
						
							|  | grants Licensee a nonexclusive, royalty-free, world-wide license to reproduce, | 
						
						
							|  | analyze, test, perform and/or display publicly, prepare derivative works, | 
						
						
							|  | distribute, and otherwise use Python alone or in any derivative version, | 
						
						
							|  | provided, however, that PSF's License Agreement and PSF's notice of copyright, | 
						
						
							|  | i.e., "Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, | 
						
						
							|  | 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Python Software Foundation; | 
						
						
							|  | All Rights Reserved" are retained in Python alone or in any derivative version | 
						
						
							|  | prepared by Licensee. | 
						
						
							|  | 
 | 
						
						
							|  | 3. In the event Licensee prepares a derivative work that is based on | 
						
						
							|  | or incorporates Python or any part thereof, and wants to make | 
						
						
							|  | the derivative work available to others as provided herein, then | 
						
						
							|  | Licensee hereby agrees to include in any such work a brief summary of | 
						
						
							|  | the changes made to Python. | 
						
						
							|  | 
 | 
						
						
							|  | 4. PSF is making Python available to Licensee on an "AS IS" | 
						
						
							|  | basis.  PSF MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR | 
						
						
							|  | IMPLIED.  BY WAY OF EXAMPLE, BUT NOT LIMITATION, PSF MAKES NO AND | 
						
						
							|  | DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS | 
						
						
							|  | FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON WILL NOT | 
						
						
							|  | INFRINGE ANY THIRD PARTY RIGHTS. | 
						
						
							|  | 
 | 
						
						
							|  | 5. PSF SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON | 
						
						
							|  | FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS | 
						
						
							|  | A RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON, | 
						
						
							|  | OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF. | 
						
						
							|  | 
 | 
						
						
							|  | 6. This License Agreement will automatically terminate upon a material | 
						
						
							|  | breach of its terms and conditions. | 
						
						
							|  | 
 | 
						
						
							|  | 7. Nothing in this License Agreement shall be deemed to create any | 
						
						
							|  | relationship of agency, partnership, or joint venture between PSF and | 
						
						
							|  | Licensee.  This License Agreement does not grant permission to use PSF | 
						
						
							|  | trademarks or trade name in a trademark sense to endorse or promote | 
						
						
							|  | products or services of Licensee, or any third party. | 
						
						
							|  | 
 | 
						
						
							|  | 8. By copying, installing or otherwise using Python, Licensee | 
						
						
							|  | agrees to be bound by the terms and conditions of this License | 
						
						
							|  | Agreement. | 
						
						
							|  | 
 | 
						
						
							|  | 
 | 
						
						
							|  | BEOPEN.COM LICENSE AGREEMENT FOR PYTHON 2.0 | 
						
						
							|  | ------------------------------------------- | 
						
						
							|  | 
 | 
						
						
							|  | BEOPEN PYTHON OPEN SOURCE LICENSE AGREEMENT VERSION 1 | 
						
						
							|  | 
 | 
						
						
							|  | 1. This LICENSE AGREEMENT is between BeOpen.com ("BeOpen"), having an | 
						
						
							|  | office at 160 Saratoga Avenue, Santa Clara, CA 95051, and the | 
						
						
							|  | Individual or Organization ("Licensee") accessing and otherwise using | 
						
						
							|  | this software in source or binary form and its associated | 
						
						
							|  | documentation ("the Software"). | 
						
						
							|  | 
 | 
						
						
							|  | 2. Subject to the terms and conditions of this BeOpen Python License | 
						
						
							|  | Agreement, BeOpen hereby grants Licensee a non-exclusive, | 
						
						
							|  | royalty-free, world-wide license to reproduce, analyze, test, perform | 
						
						
							|  | and/or display publicly, prepare derivative works, distribute, and | 
						
						
							|  | otherwise use the Software alone or in any derivative version, | 
						
						
							|  | provided, however, that the BeOpen Python License is retained in the | 
						
						
							|  | Software, alone or in any derivative version prepared by Licensee. | 
						
						
							|  | 
 | 
						
						
							|  | 3. BeOpen is making the Software available to Licensee on an "AS IS" | 
						
						
							|  | basis.  BEOPEN MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR | 
						
						
							|  | IMPLIED.  BY WAY OF EXAMPLE, BUT NOT LIMITATION, BEOPEN MAKES NO AND | 
						
						
							|  | DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS | 
						
						
							|  | FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF THE SOFTWARE WILL NOT | 
						
						
							|  | INFRINGE ANY THIRD PARTY RIGHTS. | 
						
						
							|  | 
 | 
						
						
							|  | 4. BEOPEN SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF THE | 
						
						
							|  | SOFTWARE FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS | 
						
						
							|  | AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THE SOFTWARE, OR ANY | 
						
						
							|  | DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF. | 
						
						
							|  | 
 | 
						
						
							|  | 5. This License Agreement will automatically terminate upon a material | 
						
						
							|  | breach of its terms and conditions. | 
						
						
							|  | 
 | 
						
						
							|  | 6. This License Agreement shall be governed by and interpreted in all | 
						
						
							|  | respects by the law of the State of California, excluding conflict of | 
						
						
							|  | law provisions.  Nothing in this License Agreement shall be deemed to | 
						
						
							|  | create any relationship of agency, partnership, or joint venture | 
						
						
							|  | between BeOpen and Licensee.  This License Agreement does not grant | 
						
						
							|  | permission to use BeOpen trademarks or trade names in a trademark | 
						
						
							|  | sense to endorse or promote products or services of Licensee, or any | 
						
						
							|  | third party.  As an exception, the "BeOpen Python" logos available at | 
						
						
							|  | http://www.pythonlabs.com/logos.html may be used according to the | 
						
						
							|  | permissions granted on that web page. | 
						
						
							|  | 
 | 
						
						
							|  | 7. By copying, installing or otherwise using the software, Licensee | 
						
						
							|  | agrees to be bound by the terms and conditions of this License | 
						
						
							|  | Agreement. | 
						
						
							|  | 
 | 
						
						
							|  | 
 | 
						
						
							|  | CNRI LICENSE AGREEMENT FOR PYTHON 1.6.1 | 
						
						
							|  | --------------------------------------- | 
						
						
							|  | 
 | 
						
						
							|  | 1. This LICENSE AGREEMENT is between the Corporation for National | 
						
						
							|  | Research Initiatives, having an office at 1895 Preston White Drive, | 
						
						
							|  | Reston, VA 20191 ("CNRI"), and the Individual or Organization | 
						
						
							|  | ("Licensee") accessing and otherwise using Python 1.6.1 software in | 
						
						
							|  | source or binary form and its associated documentation. | 
						
						
							|  | 
 | 
						
						
							|  | 2. Subject to the terms and conditions of this License Agreement, CNRI | 
						
						
							|  | hereby grants Licensee a nonexclusive, royalty-free, world-wide | 
						
						
							|  | license to reproduce, analyze, test, perform and/or display publicly, | 
						
						
							|  | prepare derivative works, distribute, and otherwise use Python 1.6.1 | 
						
						
							|  | alone or in any derivative version, provided, however, that CNRI's | 
						
						
							|  | License Agreement and CNRI's notice of copyright, i.e., "Copyright (c) | 
						
						
							|  | 1995-2001 Corporation for National Research Initiatives; All Rights | 
						
						
							|  | Reserved" are retained in Python 1.6.1 alone or in any derivative | 
						
						
							|  | version prepared by Licensee.  Alternately, in lieu of CNRI's License | 
						
						
							|  | Agreement, Licensee may substitute the following text (omitting the | 
						
						
							|  | quotes): "Python 1.6.1 is made available subject to the terms and | 
						
						
							|  | conditions in CNRI's License Agreement.  This Agreement together with | 
						
						
							|  | Python 1.6.1 may be located on the Internet using the following | 
						
						
							|  | unique, persistent identifier (known as a handle): 1895.22/1013.  This | 
						
						
							|  | Agreement may also be obtained from a proxy server on the Internet | 
						
						
							|  | using the following URL: http://hdl.handle.net/1895.22/1013". | 
						
						
							|  | 
 | 
						
						
							|  | 3. In the event Licensee prepares a derivative work that is based on | 
						
						
							|  | or incorporates Python 1.6.1 or any part thereof, and wants to make | 
						
						
							|  | the derivative work available to others as provided herein, then | 
						
						
							|  | Licensee hereby agrees to include in any such work a brief summary of | 
						
						
							|  | the changes made to Python 1.6.1. | 
						
						
							|  | 
 | 
						
						
							|  | 4. CNRI is making Python 1.6.1 available to Licensee on an "AS IS" | 
						
						
							|  | basis.  CNRI MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR | 
						
						
							|  | IMPLIED.  BY WAY OF EXAMPLE, BUT NOT LIMITATION, CNRI MAKES NO AND | 
						
						
							|  | DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS | 
						
						
							|  | FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON 1.6.1 WILL NOT | 
						
						
							|  | INFRINGE ANY THIRD PARTY RIGHTS. | 
						
						
							|  | 
 | 
						
						
							|  | 5. CNRI SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON | 
						
						
							|  | 1.6.1 FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS | 
						
						
							|  | A RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON 1.6.1, | 
						
						
							|  | OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF. | 
						
						
							|  | 
 | 
						
						
							|  | 6. This License Agreement will automatically terminate upon a material | 
						
						
							|  | breach of its terms and conditions. | 
						
						
							|  | 
 | 
						
						
							|  | 7. This License Agreement shall be governed by the federal | 
						
						
							|  | intellectual property law of the United States, including without | 
						
						
							|  | limitation the federal copyright law, and, to the extent such | 
						
						
							|  | U.S. federal law does not apply, by the law of the Commonwealth of | 
						
						
							|  | Virginia, excluding Virginia's conflict of law provisions. | 
						
						
							|  | Notwithstanding the foregoing, with regard to derivative works based | 
						
						
							|  | on Python 1.6.1 that incorporate non-separable material that was | 
						
						
							|  | previously distributed under the GNU General Public License (GPL), the | 
						
						
							|  | law of the Commonwealth of Virginia shall govern this License | 
						
						
							|  | Agreement only as to issues arising under or with respect to | 
						
						
							|  | Paragraphs 4, 5, and 7 of this License Agreement.  Nothing in this | 
						
						
							|  | License Agreement shall be deemed to create any relationship of | 
						
						
							|  | agency, partnership, or joint venture between CNRI and Licensee.  This | 
						
						
							|  | License Agreement does not grant permission to use CNRI trademarks or | 
						
						
							|  | trade name in a trademark sense to endorse or promote products or | 
						
						
							|  | services of Licensee, or any third party. | 
						
						
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							|  | 8. By clicking on the "ACCEPT" button where indicated, or by copying, | 
						
						
							|  | installing or otherwise using Python 1.6.1, Licensee agrees to be | 
						
						
							|  | bound by the terms and conditions of this License Agreement. | 
						
						
							|  | 
 | 
						
						
							|  |         ACCEPT | 
						
						
							|  | 
 | 
						
						
							|  | 
 | 
						
						
							|  | CWI LICENSE AGREEMENT FOR PYTHON 0.9.0 THROUGH 1.2 | 
						
						
							|  | -------------------------------------------------- | 
						
						
							|  | 
 | 
						
						
							|  | Copyright (c) 1991 - 1995, Stichting Mathematisch Centrum Amsterdam, | 
						
						
							|  | The Netherlands.  All rights reserved. | 
						
						
							|  | 
 | 
						
						
							|  | Permission to use, copy, modify, and distribute this software and its | 
						
						
							|  | documentation for any purpose and without fee is hereby granted, | 
						
						
							|  | provided that the above copyright notice appear in all copies and that | 
						
						
							|  | both that copyright notice and this permission notice appear in | 
						
						
							|  | supporting documentation, and that the name of Stichting Mathematisch | 
						
						
							|  | Centrum or CWI not be used in advertising or publicity pertaining to | 
						
						
							|  | distribution of the software without specific, written prior | 
						
						
							|  | permission. | 
						
						
							|  | 
 | 
						
						
							|  | STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO | 
						
						
							|  | THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND | 
						
						
							|  | FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE | 
						
						
							|  | FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | 
						
						
							|  | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | 
						
						
							|  | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT | 
						
						
							|  | OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 |