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  1. Django is licensed under the three-clause BSD license; see the file
  2. LICENSE for details.
  3. Django includes code from the Python standard library, which is licensed under
  4. the Python license, a permissive open source license. The copyright and license
  5. is included below for compliance with Python's terms.
  6. ----------------------------------------------------------------------
  7. Copyright (c) 2001-present Python Software Foundation; All Rights Reserved
  8. A. HISTORY OF THE SOFTWARE
  9. ==========================
  10. Python was created in the early 1990s by Guido van Rossum at Stichting
  11. Mathematisch Centrum (CWI, see http://www.cwi.nl) in the Netherlands
  12. as a successor of a language called ABC. Guido remains Python's
  13. principal author, although it includes many contributions from others.
  14. In 1995, Guido continued his work on Python at the Corporation for
  15. National Research Initiatives (CNRI, see http://www.cnri.reston.va.us)
  16. in Reston, Virginia where he released several versions of the
  17. software.
  18. In May 2000, Guido and the Python core development team moved to
  19. BeOpen.com to form the BeOpen PythonLabs team. In October of the same
  20. year, the PythonLabs team moved to Digital Creations, which became
  21. Zope Corporation. In 2001, the Python Software Foundation (PSF, see
  22. https://www.python.org/psf/) was formed, a non-profit organization
  23. created specifically to own Python-related Intellectual Property.
  24. Zope Corporation was a sponsoring member of the PSF.
  25. All Python releases are Open Source (see http://www.opensource.org for
  26. the Open Source Definition). Historically, most, but not all, Python
  27. releases have also been GPL-compatible; the table below summarizes
  28. the various releases.
  29. Release Derived Year Owner GPL-
  30. from compatible? (1)
  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. 2.1.2 2.1.1 2002 PSF yes
  40. 2.1.3 2.1.2 2002 PSF yes
  41. 2.2 and above 2.1.1 2001-now PSF yes
  42. Footnotes:
  43. (1) GPL-compatible doesn't mean that we're distributing Python under
  44. the GPL. All Python licenses, unlike the GPL, let you distribute
  45. a modified version without making your changes open source. The
  46. GPL-compatible licenses make it possible to combine Python with
  47. other software that is released under the GPL; the others don't.
  48. (2) According to Richard Stallman, 1.6.1 is not GPL-compatible,
  49. because its license has a choice of law clause. According to
  50. CNRI, however, Stallman's lawyer has told CNRI's lawyer that 1.6.1
  51. is "not incompatible" with the GPL.
  52. Thanks to the many outside volunteers who have worked under Guido's
  53. direction to make these releases possible.
  54. B. TERMS AND CONDITIONS FOR ACCESSING OR OTHERWISE USING PYTHON
  55. ===============================================================
  56. Python software and documentation are licensed under the
  57. Python Software Foundation License Version 2.
  58. Starting with Python 3.8.6, examples, recipes, and other code in
  59. the documentation are dual licensed under the PSF License Version 2
  60. and the Zero-Clause BSD license.
  61. Some software incorporated into Python is under different licenses.
  62. The licenses are listed with code falling under that license.
  63. PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2
  64. --------------------------------------------
  65. 1. This LICENSE AGREEMENT is between the Python Software Foundation
  66. ("PSF"), and the Individual or Organization ("Licensee") accessing and
  67. otherwise using this software ("Python") in source or binary form and
  68. its associated documentation.
  69. 2. Subject to the terms and conditions of this License Agreement, PSF hereby
  70. grants Licensee a nonexclusive, royalty-free, world-wide license to reproduce,
  71. analyze, test, perform and/or display publicly, prepare derivative works,
  72. distribute, and otherwise use Python alone or in any derivative version,
  73. provided, however, that PSF's License Agreement and PSF's notice of copyright,
  74. i.e., "Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
  75. 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 Python Software Foundation;
  76. All Rights Reserved" are retained in Python alone or in any derivative version
  77. prepared by Licensee.
  78. 3. In the event Licensee prepares a derivative work that is based on
  79. or incorporates Python or any part thereof, and wants to make
  80. the derivative work available to others as provided herein, then
  81. Licensee hereby agrees to include in any such work a brief summary of
  82. the changes made to Python.
  83. 4. PSF is making Python available to Licensee on an "AS IS"
  84. basis. PSF MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
  85. IMPLIED. BY WAY OF EXAMPLE, BUT NOT LIMITATION, PSF MAKES NO AND
  86. DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
  87. FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON WILL NOT
  88. INFRINGE ANY THIRD PARTY RIGHTS.
  89. 5. PSF SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON
  90. FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS
  91. A RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON,
  92. OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.
  93. 6. This License Agreement will automatically terminate upon a material
  94. breach of its terms and conditions.
  95. 7. Nothing in this License Agreement shall be deemed to create any
  96. relationship of agency, partnership, or joint venture between PSF and
  97. Licensee. This License Agreement does not grant permission to use PSF
  98. trademarks or trade name in a trademark sense to endorse or promote
  99. products or services of Licensee, or any third party.
  100. 8. By copying, installing or otherwise using Python, Licensee
  101. agrees to be bound by the terms and conditions of this License
  102. Agreement.
  103. BEOPEN.COM LICENSE AGREEMENT FOR PYTHON 2.0
  104. -------------------------------------------
  105. BEOPEN PYTHON OPEN SOURCE LICENSE AGREEMENT VERSION 1
  106. 1. This LICENSE AGREEMENT is between BeOpen.com ("BeOpen"), having an
  107. office at 160 Saratoga Avenue, Santa Clara, CA 95051, and the
  108. Individual or Organization ("Licensee") accessing and otherwise using
  109. this software in source or binary form and its associated
  110. documentation ("the Software").
  111. 2. Subject to the terms and conditions of this BeOpen Python License
  112. Agreement, BeOpen hereby grants Licensee a non-exclusive,
  113. royalty-free, world-wide license to reproduce, analyze, test, perform
  114. and/or display publicly, prepare derivative works, distribute, and
  115. otherwise use the Software alone or in any derivative version,
  116. provided, however, that the BeOpen Python License is retained in the
  117. Software, alone or in any derivative version prepared by Licensee.
  118. 3. BeOpen is making the Software available to Licensee on an "AS IS"
  119. basis. BEOPEN MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
  120. IMPLIED. BY WAY OF EXAMPLE, BUT NOT LIMITATION, BEOPEN MAKES NO AND
  121. DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
  122. FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF THE SOFTWARE WILL NOT
  123. INFRINGE ANY THIRD PARTY RIGHTS.
  124. 4. BEOPEN SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF THE
  125. SOFTWARE FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS
  126. AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THE SOFTWARE, OR ANY
  127. DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.
  128. 5. This License Agreement will automatically terminate upon a material
  129. breach of its terms and conditions.
  130. 6. This License Agreement shall be governed by and interpreted in all
  131. respects by the law of the State of California, excluding conflict of
  132. law provisions. Nothing in this License Agreement shall be deemed to
  133. create any relationship of agency, partnership, or joint venture
  134. between BeOpen and Licensee. This License Agreement does not grant
  135. permission to use BeOpen trademarks or trade names in a trademark
  136. sense to endorse or promote products or services of Licensee, or any
  137. third party. As an exception, the "BeOpen Python" logos available at
  138. http://www.pythonlabs.com/logos.html may be used according to the
  139. permissions granted on that web page.
  140. 7. By copying, installing or otherwise using the software, Licensee
  141. agrees to be bound by the terms and conditions of this License
  142. Agreement.
  143. CNRI LICENSE AGREEMENT FOR PYTHON 1.6.1
  144. ---------------------------------------
  145. 1. This LICENSE AGREEMENT is between the Corporation for National
  146. Research Initiatives, having an office at 1895 Preston White Drive,
  147. Reston, VA 20191 ("CNRI"), and the Individual or Organization
  148. ("Licensee") accessing and otherwise using Python 1.6.1 software in
  149. source or binary form and its associated documentation.
  150. 2. Subject to the terms and conditions of this License Agreement, CNRI
  151. hereby grants Licensee a nonexclusive, royalty-free, world-wide
  152. license to reproduce, analyze, test, perform and/or display publicly,
  153. prepare derivative works, distribute, and otherwise use Python 1.6.1
  154. alone or in any derivative version, provided, however, that CNRI's
  155. License Agreement and CNRI's notice of copyright, i.e., "Copyright (c)
  156. 1995-2001 Corporation for National Research Initiatives; All Rights
  157. Reserved" are retained in Python 1.6.1 alone or in any derivative
  158. version prepared by Licensee. Alternately, in lieu of CNRI's License
  159. Agreement, Licensee may substitute the following text (omitting the
  160. quotes): "Python 1.6.1 is made available subject to the terms and
  161. conditions in CNRI's License Agreement. This Agreement together with
  162. Python 1.6.1 may be located on the internet using the following
  163. unique, persistent identifier (known as a handle): 1895.22/1013. This
  164. Agreement may also be obtained from a proxy server on the internet
  165. using the following URL: http://hdl.handle.net/1895.22/1013".
  166. 3. In the event Licensee prepares a derivative work that is based on
  167. or incorporates Python 1.6.1 or any part thereof, and wants to make
  168. the derivative work available to others as provided herein, then
  169. Licensee hereby agrees to include in any such work a brief summary of
  170. the changes made to Python 1.6.1.
  171. 4. CNRI is making Python 1.6.1 available to Licensee on an "AS IS"
  172. basis. CNRI MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
  173. IMPLIED. BY WAY OF EXAMPLE, BUT NOT LIMITATION, CNRI MAKES NO AND
  174. DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
  175. FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON 1.6.1 WILL NOT
  176. INFRINGE ANY THIRD PARTY RIGHTS.
  177. 5. CNRI SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON
  178. 1.6.1 FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS
  179. A RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON 1.6.1,
  180. OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.
  181. 6. This License Agreement will automatically terminate upon a material
  182. breach of its terms and conditions.
  183. 7. This License Agreement shall be governed by the federal
  184. intellectual property law of the United States, including without
  185. limitation the federal copyright law, and, to the extent such
  186. U.S. federal law does not apply, by the law of the Commonwealth of
  187. Virginia, excluding Virginia's conflict of law provisions.
  188. Notwithstanding the foregoing, with regard to derivative works based
  189. on Python 1.6.1 that incorporate non-separable material that was
  190. previously distributed under the GNU General Public License (GPL), the
  191. law of the Commonwealth of Virginia shall govern this License
  192. Agreement only as to issues arising under or with respect to
  193. Paragraphs 4, 5, and 7 of this License Agreement. Nothing in this
  194. License Agreement shall be deemed to create any relationship of
  195. agency, partnership, or joint venture between CNRI and Licensee. This
  196. License Agreement does not grant permission to use CNRI trademarks or
  197. trade name in a trademark sense to endorse or promote products or
  198. services of Licensee, or any third party.
  199. 8. By clicking on the "ACCEPT" button where indicated, or by copying,
  200. installing or otherwise using Python 1.6.1, Licensee agrees to be
  201. bound by the terms and conditions of this License Agreement.
  202. ACCEPT
  203. CWI LICENSE AGREEMENT FOR PYTHON 0.9.0 THROUGH 1.2
  204. --------------------------------------------------
  205. Copyright (c) 1991 - 1995, Stichting Mathematisch Centrum Amsterdam,
  206. The Netherlands. All rights reserved.
  207. Permission to use, copy, modify, and distribute this software and its
  208. documentation for any purpose and without fee is hereby granted,
  209. provided that the above copyright notice appear in all copies and that
  210. both that copyright notice and this permission notice appear in
  211. supporting documentation, and that the name of Stichting Mathematisch
  212. Centrum or CWI not be used in advertising or publicity pertaining to
  213. distribution of the software without specific, written prior
  214. permission.
  215. STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
  216. THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  217. FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
  218. FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  219. WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  220. ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  221. OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  222. ZERO-CLAUSE BSD LICENSE FOR CODE IN THE PYTHON DOCUMENTATION
  223. ----------------------------------------------------------------------
  224. Permission to use, copy, modify, and/or distribute this software for any
  225. purpose with or without fee is hereby granted.
  226. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
  227. REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  228. AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
  229. INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  230. LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
  231. OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  232. PERFORMANCE OF THIS SOFTWARE.