python-license.txt
1 A. HISTORY OF THE SOFTWARE 2 ========================== 3 4 Python was created in the early 1990s by Guido van Rossum at Stichting 5 Mathematisch Centrum (CWI, see http://www.cwi.nl) in the Netherlands 6 as a successor of a language called ABC. Guido remains Python's 7 principal author, although it includes many contributions from others. 8 9 In 1995, Guido continued his work on Python at the Corporation for 10 National Research Initiatives (CNRI, see http://www.cnri.reston.va.us) 11 in Reston, Virginia where he released several versions of the 12 software. 13 14 In May 2000, Guido and the Python core development team moved to 15 BeOpen.com to form the BeOpen PythonLabs team. In October of the same 16 year, the PythonLabs team moved to Digital Creations (now Zope 17 Corporation, see http://www.zope.com). In 2001, the Python Software 18 Foundation (PSF, see http://www.python.org/psf/) was formed, a 19 non-profit organization created specifically to own Python-related 20 Intellectual Property. Zope Corporation is a sponsoring member of 21 the PSF. 22 23 All Python releases are Open Source (see http://www.opensource.org for 24 the Open Source Definition). Historically, most, but not all, Python 25 releases have also been GPL-compatible; the table below summarizes 26 the various releases. 27 28 Release Derived Year Owner GPL- 29 from compatible? (1) 30 31 0.9.0 thru 1.2 1991-1995 CWI yes 32 1.3 thru 1.5.2 1.2 1995-1999 CNRI yes 33 1.6 1.5.2 2000 CNRI no 34 2.0 1.6 2000 BeOpen.com no 35 1.6.1 1.6 2001 CNRI yes (2) 36 2.1 2.0+1.6.1 2001 PSF no 37 2.0.1 2.0+1.6.1 2001 PSF yes 38 2.1.1 2.1+2.0.1 2001 PSF yes 39 2.2 2.1.1 2001 PSF yes 40 2.1.2 2.1.1 2002 PSF yes 41 2.1.3 2.1.2 2002 PSF yes 42 2.2.1 2.2 2002 PSF yes 43 2.2.2 2.2.1 2002 PSF yes 44 2.2.3 2.2.2 2003 PSF yes 45 2.3 2.2.2 2002-2003 PSF yes 46 2.3.1 2.3 2002-2003 PSF yes 47 2.3.2 2.3.1 2002-2003 PSF yes 48 2.3.3 2.3.2 2002-2003 PSF yes 49 2.3.4 2.3.3 2004 PSF yes 50 2.3.5 2.3.4 2005 PSF yes 51 2.4 2.3 2004 PSF yes 52 2.4.1 2.4 2005 PSF yes 53 2.4.2 2.4.1 2005 PSF yes 54 2.4.3 2.4.2 2006 PSF yes 55 2.4.4 2.4.3 2006 PSF yes 56 2.5 2.4 2006 PSF yes 57 2.5.1 2.5 2007 PSF yes 58 2.5.2 2.5.1 2008 PSF yes 59 2.5.3 2.5.2 2008 PSF yes 60 2.6 2.5 2008 PSF yes 61 2.6.1 2.6 2008 PSF yes 62 2.6.2 2.6.1 2009 PSF yes 63 2.6.3 2.6.2 2009 PSF yes 64 2.6.4 2.6.3 2009 PSF yes 65 2.6.5 2.6.4 2010 PSF yes 66 3.0 2.6 2008 PSF yes 67 3.0.1 3.0 2009 PSF yes 68 3.1 3.0.1 2009 PSF yes 69 3.1.1 3.1 2009 PSF yes 70 3.1.2 3.1.1 2010 PSF yes 71 3.1.3 3.1.2 2010 PSF yes 72 3.1.4 3.1.3 2011 PSF yes 73 3.2 3.1 2011 PSF yes 74 3.2.1 3.2 2011 PSF yes 75 3.2.2 3.2.1 2011 PSF yes 76 3.2.3 3.2.2 2012 PSF yes 77 3.3.0 3.2 2012 PSF yes 78 79 Footnotes: 80 81 (1) GPL-compatible doesn't mean that we're distributing Python under 82 the GPL. All Python licenses, unlike the GPL, let you distribute 83 a modified version without making your changes open source. The 84 GPL-compatible licenses make it possible to combine Python with 85 other software that is released under the GPL; the others don't. 86 87 (2) According to Richard Stallman, 1.6.1 is not GPL-compatible, 88 because its license has a choice of law clause. According to 89 CNRI, however, Stallman's lawyer has told CNRI's lawyer that 1.6.1 90 is "not incompatible" with the GPL. 91 92 Thanks to the many outside volunteers who have worked under Guido's 93 direction to make these releases possible. 94 95 96 B. TERMS AND CONDITIONS FOR ACCESSING OR OTHERWISE USING PYTHON 97 =============================================================== 98 99 PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2 100 -------------------------------------------- 101 102 1. This LICENSE AGREEMENT is between the Python Software Foundation 103 ("PSF"), and the Individual or Organization ("Licensee") accessing and 104 otherwise using this software ("Python") in source or binary form and 105 its associated documentation. 106 107 2. Subject to the terms and conditions of this License Agreement, PSF hereby 108 grants Licensee a nonexclusive, royalty-free, world-wide license to reproduce, 109 analyze, test, perform and/or display publicly, prepare derivative works, 110 distribute, and otherwise use Python alone or in any derivative version, 111 provided, however, that PSF's License Agreement and PSF's notice of copyright, 112 i.e., "Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 113 2011, 2012 Python Software Foundation; All Rights Reserved" are retained in Python 114 alone or in any derivative version prepared by Licensee. 115 116 3. In the event Licensee prepares a derivative work that is based on 117 or incorporates Python or any part thereof, and wants to make 118 the derivative work available to others as provided herein, then 119 Licensee hereby agrees to include in any such work a brief summary of 120 the changes made to Python. 121 122 4. PSF is making Python available to Licensee on an "AS IS" 123 basis. PSF MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR 124 IMPLIED. BY WAY OF EXAMPLE, BUT NOT LIMITATION, PSF MAKES NO AND 125 DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS 126 FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON WILL NOT 127 INFRINGE ANY THIRD PARTY RIGHTS. 128 129 5. PSF SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON 130 FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS 131 A RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON, 132 OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF. 133 134 6. This License Agreement will automatically terminate upon a material 135 breach of its terms and conditions. 136 137 7. Nothing in this License Agreement shall be deemed to create any 138 relationship of agency, partnership, or joint venture between PSF and 139 Licensee. This License Agreement does not grant permission to use PSF 140 trademarks or trade name in a trademark sense to endorse or promote 141 products or services of Licensee, or any third party. 142 143 8. By copying, installing or otherwise using Python, Licensee 144 agrees to be bound by the terms and conditions of this License 145 Agreement. 146 147 148 BEOPEN.COM LICENSE AGREEMENT FOR PYTHON 2.0 149 ------------------------------------------- 150 151 BEOPEN PYTHON OPEN SOURCE LICENSE AGREEMENT VERSION 1 152 153 1. This LICENSE AGREEMENT is between BeOpen.com ("BeOpen"), having an 154 office at 160 Saratoga Avenue, Santa Clara, CA 95051, and the 155 Individual or Organization ("Licensee") accessing and otherwise using 156 this software in source or binary form and its associated 157 documentation ("the Software"). 158 159 2. Subject to the terms and conditions of this BeOpen Python License 160 Agreement, BeOpen hereby grants Licensee a non-exclusive, 161 royalty-free, world-wide license to reproduce, analyze, test, perform 162 and/or display publicly, prepare derivative works, distribute, and 163 otherwise use the Software alone or in any derivative version, 164 provided, however, that the BeOpen Python License is retained in the 165 Software, alone or in any derivative version prepared by Licensee. 166 167 3. BeOpen is making the Software available to Licensee on an "AS IS" 168 basis. BEOPEN MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR 169 IMPLIED. BY WAY OF EXAMPLE, BUT NOT LIMITATION, BEOPEN MAKES NO AND 170 DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS 171 FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF THE SOFTWARE WILL NOT 172 INFRINGE ANY THIRD PARTY RIGHTS. 173 174 4. BEOPEN SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF THE 175 SOFTWARE FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS 176 AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THE SOFTWARE, OR ANY 177 DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF. 178 179 5. This License Agreement will automatically terminate upon a material 180 breach of its terms and conditions. 181 182 6. This License Agreement shall be governed by and interpreted in all 183 respects by the law of the State of California, excluding conflict of 184 law provisions. Nothing in this License Agreement shall be deemed to 185 create any relationship of agency, partnership, or joint venture 186 between BeOpen and Licensee. This License Agreement does not grant 187 permission to use BeOpen trademarks or trade names in a trademark 188 sense to endorse or promote products or services of Licensee, or any 189 third party. As an exception, the "BeOpen Python" logos available at 190 http://www.pythonlabs.com/logos.html may be used according to the 191 permissions granted on that web page. 192 193 7. By copying, installing or otherwise using the software, Licensee 194 agrees to be bound by the terms and conditions of this License 195 Agreement. 196 197 198 CNRI LICENSE AGREEMENT FOR PYTHON 1.6.1 199 --------------------------------------- 200 201 1. This LICENSE AGREEMENT is between the Corporation for National 202 Research Initiatives, having an office at 1895 Preston White Drive, 203 Reston, VA 20191 ("CNRI"), and the Individual or Organization 204 ("Licensee") accessing and otherwise using Python 1.6.1 software in 205 source or binary form and its associated documentation. 206 207 2. Subject to the terms and conditions of this License Agreement, CNRI 208 hereby grants Licensee a nonexclusive, royalty-free, world-wide 209 license to reproduce, analyze, test, perform and/or display publicly, 210 prepare derivative works, distribute, and otherwise use Python 1.6.1 211 alone or in any derivative version, provided, however, that CNRI's 212 License Agreement and CNRI's notice of copyright, i.e., "Copyright (c) 213 1995-2001 Corporation for National Research Initiatives; All Rights 214 Reserved" are retained in Python 1.6.1 alone or in any derivative 215 version prepared by Licensee. Alternately, in lieu of CNRI's License 216 Agreement, Licensee may substitute the following text (omitting the 217 quotes): "Python 1.6.1 is made available subject to the terms and 218 conditions in CNRI's License Agreement. This Agreement together with 219 Python 1.6.1 may be located on the Internet using the following 220 unique, persistent identifier (known as a handle): 1895.22/1013. This 221 Agreement may also be obtained from a proxy server on the Internet 222 using the following URL: http://hdl.handle.net/1895.22/1013". 223 224 3. In the event Licensee prepares a derivative work that is based on 225 or incorporates Python 1.6.1 or any part thereof, and wants to make 226 the derivative work available to others as provided herein, then 227 Licensee hereby agrees to include in any such work a brief summary of 228 the changes made to Python 1.6.1. 229 230 4. CNRI is making Python 1.6.1 available to Licensee on an "AS IS" 231 basis. CNRI MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR 232 IMPLIED. BY WAY OF EXAMPLE, BUT NOT LIMITATION, CNRI MAKES NO AND 233 DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS 234 FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON 1.6.1 WILL NOT 235 INFRINGE ANY THIRD PARTY RIGHTS. 236 237 5. CNRI SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON 238 1.6.1 FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS 239 A RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON 1.6.1, 240 OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF. 241 242 6. This License Agreement will automatically terminate upon a material 243 breach of its terms and conditions. 244 245 7. This License Agreement shall be governed by the federal 246 intellectual property law of the United States, including without 247 limitation the federal copyright law, and, to the extent such 248 U.S. federal law does not apply, by the law of the Commonwealth of 249 Virginia, excluding Virginia's conflict of law provisions. 250 Notwithstanding the foregoing, with regard to derivative works based 251 on Python 1.6.1 that incorporate non-separable material that was 252 previously distributed under the GNU General Public License (GPL), the 253 law of the Commonwealth of Virginia shall govern this License 254 Agreement only as to issues arising under or with respect to 255 Paragraphs 4, 5, and 7 of this License Agreement. Nothing in this 256 License Agreement shall be deemed to create any relationship of 257 agency, partnership, or joint venture between CNRI and Licensee. This 258 License Agreement does not grant permission to use CNRI trademarks or 259 trade name in a trademark sense to endorse or promote products or 260 services of Licensee, or any third party. 261 262 8. By clicking on the "ACCEPT" button where indicated, or by copying, 263 installing or otherwise using Python 1.6.1, Licensee agrees to be 264 bound by the terms and conditions of this License Agreement. 265 266 ACCEPT 267 268 269 CWI LICENSE AGREEMENT FOR PYTHON 0.9.0 THROUGH 1.2 270 -------------------------------------------------- 271 272 Copyright (c) 1991 - 1995, Stichting Mathematisch Centrum Amsterdam, 273 The Netherlands. All rights reserved. 274 275 Permission to use, copy, modify, and distribute this software and its 276 documentation for any purpose and without fee is hereby granted, 277 provided that the above copyright notice appear in all copies and that 278 both that copyright notice and this permission notice appear in 279 supporting documentation, and that the name of Stichting Mathematisch 280 Centrum or CWI not be used in advertising or publicity pertaining to 281 distribution of the software without specific, written prior 282 permission. 283 284 STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO 285 THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND 286 FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE 287 FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 288 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 289 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 290 OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.