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1A. HISTORY OF THE SOFTWARE
2==========================
3
4Python was created in the early 1990s by Guido van Rossum at Stichting
5Mathematisch Centrum (CWI, see http://www.cwi.nl) in the Netherlands
6as a successor of a language called ABC. Guido remains Python's
7principal author, although it includes many contributions from others.
8
9In 1995, Guido continued his work on Python at the Corporation for
10National Research Initiatives (CNRI, see http://www.cnri.reston.va.us)
11in Reston, Virginia where he released several versions of the
12software.
13
14In May 2000, Guido and the Python core development team moved to
15BeOpen.com to form the BeOpen PythonLabs team. In October of the same
16year, the PythonLabs team moved to Digital Creations, which became
17Zope Corporation. In 2001, the Python Software Foundation (PSF, see
18https://www.python.org/psf/) was formed, a non-profit organization
19created specifically to own Python-related Intellectual Property.
20Zope Corporation was a sponsoring member of the PSF.
21
22All Python releases are Open Source (see http://www.opensource.org for
23the Open Source Definition). Historically, most, but not all, Python
24releases have also been GPL-compatible; the table below summarizes
25the various releases.
26
27 Release Derived Year Owner GPL-
28 from compatible? (1)
29
30 0.9.0 thru 1.2 1991-1995 CWI yes
31 1.3 thru 1.5.2 1.2 1995-1999 CNRI yes
32 1.6 1.5.2 2000 CNRI no
33 2.0 1.6 2000 BeOpen.com no
34 1.6.1 1.6 2001 CNRI yes (2)
35 2.1 2.0+1.6.1 2001 PSF no
36 2.0.1 2.0+1.6.1 2001 PSF yes
37 2.1.1 2.1+2.0.1 2001 PSF yes
38 2.1.2 2.1.1 2002 PSF yes
39 2.1.3 2.1.2 2002 PSF yes
40 2.2 and above 2.1.1 2001-now PSF yes
41
42Footnotes:
43
44(1) GPL-compatible doesn't mean that we're distributing Python under
45 the GPL. All Python licenses, unlike the GPL, let you distribute
46 a modified version without making your changes open source. The
47 GPL-compatible licenses make it possible to combine Python with
48 other software that is released under the GPL; the others don't.
49
50(2) According to Richard Stallman, 1.6.1 is not GPL-compatible,
51 because its license has a choice of law clause. According to
52 CNRI, however, Stallman's lawyer has told CNRI's lawyer that 1.6.1
53 is "not incompatible" with the GPL.
54
55Thanks to the many outside volunteers who have worked under Guido's
56direction to make these releases possible.
57
58
59B. TERMS AND CONDITIONS FOR ACCESSING OR OTHERWISE USING PYTHON
60===============================================================
61
62PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2
63--------------------------------------------
64
651. This LICENSE AGREEMENT is between the Python Software Foundation
66("PSF"), and the Individual or Organization ("Licensee") accessing and
67otherwise using this software ("Python") in source or binary form and
68its associated documentation.
69
702. Subject to the terms and conditions of this License Agreement, PSF hereby
71grants Licensee a nonexclusive, royalty-free, world-wide license to reproduce,
72analyze, test, perform and/or display publicly, prepare derivative works,
73distribute, and otherwise use Python alone or in any derivative version,
74provided, however, that PSF's License Agreement and PSF's notice of copyright,
75i.e., "Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
762011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Python Software Foundation;
77All Rights Reserved" are retained in Python alone or in any derivative version
78prepared by Licensee.
79
803. In the event Licensee prepares a derivative work that is based on
81or incorporates Python or any part thereof, and wants to make
82the derivative work available to others as provided herein, then
83Licensee hereby agrees to include in any such work a brief summary of
84the changes made to Python.
85
864. PSF is making Python available to Licensee on an "AS IS"
87basis. PSF MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
88IMPLIED. BY WAY OF EXAMPLE, BUT NOT LIMITATION, PSF MAKES NO AND
89DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
90FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON WILL NOT
91INFRINGE ANY THIRD PARTY RIGHTS.
92
935. PSF SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON
94FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS
95A RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON,
96OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.
97
986. This License Agreement will automatically terminate upon a material
99breach of its terms and conditions.
100
1017. Nothing in this License Agreement shall be deemed to create any
102relationship of agency, partnership, or joint venture between PSF and
103Licensee. This License Agreement does not grant permission to use PSF
104trademarks or trade name in a trademark sense to endorse or promote
105products or services of Licensee, or any third party.
106
1078. By copying, installing or otherwise using Python, Licensee
108agrees to be bound by the terms and conditions of this License
109Agreement.
110
111
112BEOPEN.COM LICENSE AGREEMENT FOR PYTHON 2.0
113-------------------------------------------
114
115BEOPEN PYTHON OPEN SOURCE LICENSE AGREEMENT VERSION 1
116
1171. This LICENSE AGREEMENT is between BeOpen.com ("BeOpen"), having an
118office at 160 Saratoga Avenue, Santa Clara, CA 95051, and the
119Individual or Organization ("Licensee") accessing and otherwise using
120this software in source or binary form and its associated
121documentation ("the Software").
122
1232. Subject to the terms and conditions of this BeOpen Python License
124Agreement, BeOpen hereby grants Licensee a non-exclusive,
125royalty-free, world-wide license to reproduce, analyze, test, perform
126and/or display publicly, prepare derivative works, distribute, and
127otherwise use the Software alone or in any derivative version,
128provided, however, that the BeOpen Python License is retained in the
129Software, alone or in any derivative version prepared by Licensee.
130
1313. BeOpen is making the Software available to Licensee on an "AS IS"
132basis. BEOPEN MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
133IMPLIED. BY WAY OF EXAMPLE, BUT NOT LIMITATION, BEOPEN MAKES NO AND
134DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
135FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF THE SOFTWARE WILL NOT
136INFRINGE ANY THIRD PARTY RIGHTS.
137
1384. BEOPEN SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF THE
139SOFTWARE FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS
140AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THE SOFTWARE, OR ANY
141DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.
142
1435. This License Agreement will automatically terminate upon a material
144breach of its terms and conditions.
145
1466. This License Agreement shall be governed by and interpreted in all
147respects by the law of the State of California, excluding conflict of
148law provisions. Nothing in this License Agreement shall be deemed to
149create any relationship of agency, partnership, or joint venture
150between BeOpen and Licensee. This License Agreement does not grant
151permission to use BeOpen trademarks or trade names in a trademark
152sense to endorse or promote products or services of Licensee, or any
153third party. As an exception, the "BeOpen Python" logos available at
154http://www.pythonlabs.com/logos.html may be used according to the
155permissions granted on that web page.
156
1577. By copying, installing or otherwise using the software, Licensee
158agrees to be bound by the terms and conditions of this License
159Agreement.
160
161
162CNRI LICENSE AGREEMENT FOR PYTHON 1.6.1
163---------------------------------------
164
1651. This LICENSE AGREEMENT is between the Corporation for National
166Research Initiatives, having an office at 1895 Preston White Drive,
167Reston, VA 20191 ("CNRI"), and the Individual or Organization
168("Licensee") accessing and otherwise using Python 1.6.1 software in
169source or binary form and its associated documentation.
170
1712. Subject to the terms and conditions of this License Agreement, CNRI
172hereby grants Licensee a nonexclusive, royalty-free, world-wide
173license to reproduce, analyze, test, perform and/or display publicly,
174prepare derivative works, distribute, and otherwise use Python 1.6.1
175alone or in any derivative version, provided, however, that CNRI's
176License Agreement and CNRI's notice of copyright, i.e., "Copyright (c)
1771995-2001 Corporation for National Research Initiatives; All Rights
178Reserved" are retained in Python 1.6.1 alone or in any derivative
179version prepared by Licensee. Alternately, in lieu of CNRI's License
180Agreement, Licensee may substitute the following text (omitting the
181quotes): "Python 1.6.1 is made available subject to the terms and
182conditions in CNRI's License Agreement. This Agreement together with
183Python 1.6.1 may be located on the Internet using the following
184unique, persistent identifier (known as a handle): 1895.22/1013. This
185Agreement may also be obtained from a proxy server on the Internet
186using the following URL: http://hdl.handle.net/1895.22/1013".
187
1883. In the event Licensee prepares a derivative work that is based on
189or incorporates Python 1.6.1 or any part thereof, and wants to make
190the derivative work available to others as provided herein, then
191Licensee hereby agrees to include in any such work a brief summary of
192the changes made to Python 1.6.1.
193
1944. CNRI is making Python 1.6.1 available to Licensee on an "AS IS"
195basis. CNRI MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
196IMPLIED. BY WAY OF EXAMPLE, BUT NOT LIMITATION, CNRI MAKES NO AND
197DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
198FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON 1.6.1 WILL NOT
199INFRINGE ANY THIRD PARTY RIGHTS.
200
2015. CNRI SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON
2021.6.1 FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS
203A RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON 1.6.1,
204OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.
205
2066. This License Agreement will automatically terminate upon a material
207breach of its terms and conditions.
208
2097. This License Agreement shall be governed by the federal
210intellectual property law of the United States, including without
211limitation the federal copyright law, and, to the extent such
212U.S. federal law does not apply, by the law of the Commonwealth of
213Virginia, excluding Virginia's conflict of law provisions.
214Notwithstanding the foregoing, with regard to derivative works based
215on Python 1.6.1 that incorporate non-separable material that was
216previously distributed under the GNU General Public License (GPL), the
217law of the Commonwealth of Virginia shall govern this License
218Agreement only as to issues arising under or with respect to
219Paragraphs 4, 5, and 7 of this License Agreement. Nothing in this
220License Agreement shall be deemed to create any relationship of
221agency, partnership, or joint venture between CNRI and Licensee. This
222License Agreement does not grant permission to use CNRI trademarks or
223trade name in a trademark sense to endorse or promote products or
224services of Licensee, or any third party.
225
2268. By clicking on the "ACCEPT" button where indicated, or by copying,
227installing or otherwise using Python 1.6.1, Licensee agrees to be
228bound by the terms and conditions of this License Agreement.
229
230 ACCEPT
231
232
233CWI LICENSE AGREEMENT FOR PYTHON 0.9.0 THROUGH 1.2
234--------------------------------------------------
235
236Copyright (c) 1991 - 1995, Stichting Mathematisch Centrum Amsterdam,
237The Netherlands. All rights reserved.
238
239Permission to use, copy, modify, and distribute this software and its
240documentation for any purpose and without fee is hereby granted,
241provided that the above copyright notice appear in all copies and that
242both that copyright notice and this permission notice appear in
243supporting documentation, and that the name of Stichting Mathematisch
244Centrum or CWI not be used in advertising or publicity pertaining to
245distribution of the software without specific, written prior
246permission.
247
248STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
249THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
250FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
251FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
252WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
253ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
254OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.