1.. highlightlang:: none 2 3.. _history-and-license: 4 5******************* 6History and License 7******************* 8 9 10History of the software 11======================= 12 13Python was created in the early 1990s by Guido van Rossum at Stichting 14Mathematisch Centrum (CWI, see https://www.cwi.nl/) in the Netherlands as a 15successor of a language called ABC. Guido remains Python's principal author, 16although it includes many contributions from others. 17 18In 1995, Guido continued his work on Python at the Corporation for National 19Research Initiatives (CNRI, see https://www.cnri.reston.va.us/) in Reston, 20Virginia where he released several versions of the software. 21 22In May 2000, Guido and the Python core development team moved to BeOpen.com to 23form the BeOpen PythonLabs team. In October of the same year, the PythonLabs 24team moved to Digital Creations (now Zope Corporation; see 25https://www.zope.org/). In 2001, the Python Software Foundation (PSF, see 26https://www.python.org/psf/) was formed, a non-profit organization created 27specifically to own Python-related Intellectual Property. Zope Corporation is a 28sponsoring member of the PSF. 29 30All Python releases are Open Source (see https://opensource.org/ for the Open 31Source Definition). Historically, most, but not all, Python releases have also 32been GPL-compatible; the table below summarizes the various releases. 33 34+----------------+--------------+------------+------------+-----------------+ 35| Release | Derived from | Year | Owner | GPL compatible? | 36+================+==============+============+============+=================+ 37| 0.9.0 thru 1.2 | n/a | 1991-1995 | CWI | yes | 38+----------------+--------------+------------+------------+-----------------+ 39| 1.3 thru 1.5.2 | 1.2 | 1995-1999 | CNRI | yes | 40+----------------+--------------+------------+------------+-----------------+ 41| 1.6 | 1.5.2 | 2000 | CNRI | no | 42+----------------+--------------+------------+------------+-----------------+ 43| 2.0 | 1.6 | 2000 | BeOpen.com | no | 44+----------------+--------------+------------+------------+-----------------+ 45| 1.6.1 | 1.6 | 2001 | CNRI | no | 46+----------------+--------------+------------+------------+-----------------+ 47| 2.1 | 2.0+1.6.1 | 2001 | PSF | no | 48+----------------+--------------+------------+------------+-----------------+ 49| 2.0.1 | 2.0+1.6.1 | 2001 | PSF | yes | 50+----------------+--------------+------------+------------+-----------------+ 51| 2.1.1 | 2.1+2.0.1 | 2001 | PSF | yes | 52+----------------+--------------+------------+------------+-----------------+ 53| 2.1.2 | 2.1.1 | 2002 | PSF | yes | 54+----------------+--------------+------------+------------+-----------------+ 55| 2.1.3 | 2.1.2 | 2002 | PSF | yes | 56+----------------+--------------+------------+------------+-----------------+ 57| 2.2 and above | 2.1.1 | 2001-now | PSF | yes | 58+----------------+--------------+------------+------------+-----------------+ 59 60.. note:: 61 62 GPL-compatible doesn't mean that we're distributing Python under the GPL. All 63 Python licenses, unlike the GPL, let you distribute a modified version without 64 making your changes open source. The GPL-compatible licenses make it possible to 65 combine Python with other software that is released under the GPL; the others 66 don't. 67 68Thanks to the many outside volunteers who have worked under Guido's direction to 69make these releases possible. 70 71 72Terms and conditions for accessing or otherwise using Python 73============================================================ 74 75 76PSF LICENSE AGREEMENT FOR PYTHON |release| 77------------------------------------------ 78 79.. parsed-literal:: 80 81 1. This LICENSE AGREEMENT is between the Python Software Foundation ("PSF"), and 82 the Individual or Organization ("Licensee") accessing and otherwise using Python 83 |release| software in source or binary form and its associated documentation. 84 85 2. Subject to the terms and conditions of this License Agreement, PSF hereby 86 grants Licensee a nonexclusive, royalty-free, world-wide license to reproduce, 87 analyze, test, perform and/or display publicly, prepare derivative works, 88 distribute, and otherwise use Python |release| alone or in any derivative 89 version, provided, however, that PSF's License Agreement and PSF's notice of 90 copyright, i.e., "Copyright © 2001-2021 Python Software Foundation; All Rights 91 Reserved" are retained in Python |release| alone or in any derivative version 92 prepared by Licensee. 93 94 3. In the event Licensee prepares a derivative work that is based on or 95 incorporates Python |release| or any part thereof, and wants to make the 96 derivative work available to others as provided herein, then Licensee hereby 97 agrees to include in any such work a brief summary of the changes made to Python 98 |release|. 99 100 4. PSF is making Python |release| available to Licensee on an "AS IS" basis. 101 PSF MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED. BY WAY OF 102 EXAMPLE, BUT NOT LIMITATION, PSF MAKES NO AND DISCLAIMS ANY REPRESENTATION OR 103 WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR THAT THE 104 USE OF PYTHON |release| WILL NOT INFRINGE ANY THIRD PARTY RIGHTS. 105 106 5. PSF SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON |release| 107 FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS A RESULT OF 108 MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON |release|, OR ANY DERIVATIVE 109 THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF. 110 111 6. This License Agreement will automatically terminate upon a material breach of 112 its terms and conditions. 113 114 7. Nothing in this License Agreement shall be deemed to create any relationship 115 of agency, partnership, or joint venture between PSF and Licensee. This License 116 Agreement does not grant permission to use PSF trademarks or trade name in a 117 trademark sense to endorse or promote products or services of Licensee, or any 118 third party. 119 120 8. By copying, installing or otherwise using Python |release|, Licensee agrees 121 to be bound by the terms and conditions of this License Agreement. 122 123 124BEOPEN.COM LICENSE AGREEMENT FOR PYTHON 2.0 125------------------------------------------- 126 127BEOPEN PYTHON OPEN SOURCE LICENSE AGREEMENT VERSION 1 128 129.. parsed-literal:: 130 131 1. This LICENSE AGREEMENT is between BeOpen.com ("BeOpen"), having an office at 132 160 Saratoga Avenue, Santa Clara, CA 95051, and the Individual or Organization 133 ("Licensee") accessing and otherwise using this software in source or binary 134 form and its associated documentation ("the Software"). 135 136 2. Subject to the terms and conditions of this BeOpen Python License Agreement, 137 BeOpen hereby grants Licensee a non-exclusive, royalty-free, world-wide license 138 to reproduce, analyze, test, perform and/or display publicly, prepare derivative 139 works, distribute, and otherwise use the Software alone or in any derivative 140 version, provided, however, that the BeOpen Python License is retained in the 141 Software, alone or in any derivative version prepared by Licensee. 142 143 3. BeOpen is making the Software available to Licensee on an "AS IS" basis. 144 BEOPEN MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED. BY WAY OF 145 EXAMPLE, BUT NOT LIMITATION, BEOPEN MAKES NO AND DISCLAIMS ANY REPRESENTATION OR 146 WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR THAT THE 147 USE OF THE SOFTWARE WILL NOT INFRINGE ANY THIRD PARTY RIGHTS. 148 149 4. BEOPEN SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF THE SOFTWARE FOR 150 ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS A RESULT OF USING, 151 MODIFYING OR DISTRIBUTING THE SOFTWARE, OR ANY DERIVATIVE THEREOF, EVEN IF 152 ADVISED OF THE POSSIBILITY THEREOF. 153 154 5. This License Agreement will automatically terminate upon a material breach of 155 its terms and conditions. 156 157 6. This License Agreement shall be governed by and interpreted in all respects 158 by the law of the State of California, excluding conflict of law provisions. 159 Nothing in this License Agreement shall be deemed to create any relationship of 160 agency, partnership, or joint venture between BeOpen and Licensee. This License 161 Agreement does not grant permission to use BeOpen trademarks or trade names in a 162 trademark sense to endorse or promote products or services of Licensee, or any 163 third party. As an exception, the "BeOpen Python" logos available at 164 http://www.pythonlabs.com/logos.html may be used according to the permissions 165 granted on that web page. 166 167 7. By copying, installing or otherwise using the software, Licensee agrees to be 168 bound by the terms and conditions of this License Agreement. 169 170 171CNRI LICENSE AGREEMENT FOR PYTHON 1.6.1 172--------------------------------------- 173 174.. parsed-literal:: 175 176 1. This LICENSE AGREEMENT is between the Corporation for National Research 177 Initiatives, having an office at 1895 Preston White Drive, Reston, VA 20191 178 ("CNRI"), and the Individual or Organization ("Licensee") accessing and 179 otherwise using Python 1.6.1 software in source or binary form and its 180 associated documentation. 181 182 2. Subject to the terms and conditions of this License Agreement, CNRI hereby 183 grants Licensee a nonexclusive, royalty-free, world-wide license to reproduce, 184 analyze, test, perform and/or display publicly, prepare derivative works, 185 distribute, and otherwise use Python 1.6.1 alone or in any derivative version, 186 provided, however, that CNRI's License Agreement and CNRI's notice of copyright, 187 i.e., "Copyright © 1995-2001 Corporation for National Research Initiatives; All 188 Rights Reserved" are retained in Python 1.6.1 alone or in any derivative version 189 prepared by Licensee. Alternately, in lieu of CNRI's License Agreement, 190 Licensee may substitute the following text (omitting the quotes): "Python 1.6.1 191 is made available subject to the terms and conditions in CNRI's License 192 Agreement. This Agreement together with Python 1.6.1 may be located on the 193 Internet using the following unique, persistent identifier (known as a handle): 194 1895.22/1013. This Agreement may also be obtained from a proxy server on the 195 Internet using the following URL: http://hdl.handle.net/1895.22/1013." 196 197 3. In the event Licensee prepares a derivative work that is based on or 198 incorporates Python 1.6.1 or any part thereof, and wants to make the derivative 199 work available to others as provided herein, then Licensee hereby agrees to 200 include in any such work a brief summary of the changes made to Python 1.6.1. 201 202 4. CNRI is making Python 1.6.1 available to Licensee on an "AS IS" basis. CNRI 203 MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED. BY WAY OF EXAMPLE, 204 BUT NOT LIMITATION, CNRI MAKES NO AND DISCLAIMS ANY REPRESENTATION OR WARRANTY 205 OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF 206 PYTHON 1.6.1 WILL NOT INFRINGE ANY THIRD PARTY RIGHTS. 207 208 5. CNRI SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON 1.6.1 FOR 209 ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS A RESULT OF 210 MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON 1.6.1, OR ANY DERIVATIVE 211 THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF. 212 213 6. This License Agreement will automatically terminate upon a material breach of 214 its terms and conditions. 215 216 7. This License Agreement shall be governed by the federal intellectual property 217 law of the United States, including without limitation the federal copyright 218 law, and, to the extent such U.S. federal law does not apply, by the law of the 219 Commonwealth of Virginia, excluding Virginia's conflict of law provisions. 220 Notwithstanding the foregoing, with regard to derivative works based on Python 221 1.6.1 that incorporate non-separable material that was previously distributed 222 under the GNU General Public License (GPL), the law of the Commonwealth of 223 Virginia shall govern this License Agreement only as to issues arising under or 224 with respect to Paragraphs 4, 5, and 7 of this License Agreement. Nothing in 225 this License Agreement shall be deemed to create any relationship of agency, 226 partnership, or joint venture between CNRI and Licensee. This License Agreement 227 does not grant permission to use CNRI trademarks or trade name in a trademark 228 sense to endorse or promote products or services of Licensee, or any third 229 party. 230 231 8. By clicking on the "ACCEPT" button where indicated, or by copying, installing 232 or otherwise using Python 1.6.1, Licensee agrees to be bound by the terms and 233 conditions of this License Agreement. 234 235 236CWI LICENSE AGREEMENT FOR PYTHON 0.9.0 THROUGH 1.2 237-------------------------------------------------- 238 239.. parsed-literal:: 240 241 Copyright © 1991 - 1995, Stichting Mathematisch Centrum Amsterdam, The 242 Netherlands. All rights reserved. 243 244 Permission to use, copy, modify, and distribute this software and its 245 documentation for any purpose and without fee is hereby granted, provided that 246 the above copyright notice appear in all copies and that both that copyright 247 notice and this permission notice appear in supporting documentation, and that 248 the name of Stichting Mathematisch Centrum or CWI not be used in advertising or 249 publicity pertaining to distribution of the software without specific, written 250 prior permission. 251 252 STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS 253 SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 254 EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE FOR ANY SPECIAL, INDIRECT 255 OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 256 DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 257 ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 258 SOFTWARE. 259 260 261Licenses and Acknowledgements for Incorporated Software 262======================================================= 263 264This section is an incomplete, but growing list of licenses and acknowledgements 265for third-party software incorporated in the Python distribution. 266 267 268Mersenne Twister 269---------------- 270 271The :mod:`_random` module includes code based on a download from 272http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/MT2002/emt19937ar.html. The following are 273the verbatim comments from the original code:: 274 275 A C-program for MT19937, with initialization improved 2002/1/26. 276 Coded by Takuji Nishimura and Makoto Matsumoto. 277 278 Before using, initialize the state by using init_genrand(seed) 279 or init_by_array(init_key, key_length). 280 281 Copyright (C) 1997 - 2002, Makoto Matsumoto and Takuji Nishimura, 282 All rights reserved. 283 284 Redistribution and use in source and binary forms, with or without 285 modification, are permitted provided that the following conditions 286 are met: 287 288 1. Redistributions of source code must retain the above copyright 289 notice, this list of conditions and the following disclaimer. 290 291 2. Redistributions in binary form must reproduce the above copyright 292 notice, this list of conditions and the following disclaimer in the 293 documentation and/or other materials provided with the distribution. 294 295 3. The names of its contributors may not be used to endorse or promote 296 products derived from this software without specific prior written 297 permission. 298 299 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 300 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 301 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 302 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 303 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 304 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 305 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 306 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 307 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 308 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 309 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 310 311 312 Any feedback is very welcome. 313 http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html 314 email: m-mat @ math.sci.hiroshima-u.ac.jp (remove space) 315 316 317Sockets 318------- 319 320The :mod:`socket` module uses the functions, :func:`getaddrinfo`, and 321:func:`getnameinfo`, which are coded in separate source files from the WIDE 322Project, http://www.wide.ad.jp/. :: 323 324 Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 325 All rights reserved. 326 327 Redistribution and use in source and binary forms, with or without 328 modification, are permitted provided that the following conditions 329 are met: 330 1. Redistributions of source code must retain the above copyright 331 notice, this list of conditions and the following disclaimer. 332 2. Redistributions in binary form must reproduce the above copyright 333 notice, this list of conditions and the following disclaimer in the 334 documentation and/or other materials provided with the distribution. 335 3. Neither the name of the project nor the names of its contributors 336 may be used to endorse or promote products derived from this software 337 without specific prior written permission. 338 339 THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 340 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 341 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 342 ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 343 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 344 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 345 OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 346 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 347 LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 348 OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 349 SUCH DAMAGE. 350 351 352Asynchronous socket services 353---------------------------- 354 355The :mod:`asynchat` and :mod:`asyncore` modules contain the following notice:: 356 357 Copyright 1996 by Sam Rushing 358 359 All Rights Reserved 360 361 Permission to use, copy, modify, and distribute this software and 362 its documentation for any purpose and without fee is hereby 363 granted, provided that the above copyright notice appear in all 364 copies and that both that copyright notice and this permission 365 notice appear in supporting documentation, and that the name of Sam 366 Rushing not be used in advertising or publicity pertaining to 367 distribution of the software without specific, written prior 368 permission. 369 370 SAM RUSHING DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 371 INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN 372 NO EVENT SHALL SAM RUSHING BE LIABLE FOR ANY SPECIAL, INDIRECT OR 373 CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS 374 OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, 375 NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 376 CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 377 378 379Cookie management 380----------------- 381 382The :mod:`http.cookies` module contains the following notice:: 383 384 Copyright 2000 by Timothy O'Malley <timo@alum.mit.edu> 385 386 All Rights Reserved 387 388 Permission to use, copy, modify, and distribute this software 389 and its documentation for any purpose and without fee is hereby 390 granted, provided that the above copyright notice appear in all 391 copies and that both that copyright notice and this permission 392 notice appear in supporting documentation, and that the name of 393 Timothy O'Malley not be used in advertising or publicity 394 pertaining to distribution of the software without specific, written 395 prior permission. 396 397 Timothy O'Malley DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS 398 SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 399 AND FITNESS, IN NO EVENT SHALL Timothy O'Malley BE LIABLE FOR 400 ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 401 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, 402 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 403 ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 404 PERFORMANCE OF THIS SOFTWARE. 405 406 407Execution tracing 408----------------- 409 410The :mod:`trace` module contains the following notice:: 411 412 portions copyright 2001, Autonomous Zones Industries, Inc., all rights... 413 err... reserved and offered to the public under the terms of the 414 Python 2.2 license. 415 Author: Zooko O'Whielacronx 416 http://zooko.com/ 417 mailto:zooko@zooko.com 418 419 Copyright 2000, Mojam Media, Inc., all rights reserved. 420 Author: Skip Montanaro 421 422 Copyright 1999, Bioreason, Inc., all rights reserved. 423 Author: Andrew Dalke 424 425 Copyright 1995-1997, Automatrix, Inc., all rights reserved. 426 Author: Skip Montanaro 427 428 Copyright 1991-1995, Stichting Mathematisch Centrum, all rights reserved. 429 430 431 Permission to use, copy, modify, and distribute this Python software and 432 its associated documentation for any purpose without fee is hereby 433 granted, provided that the above copyright notice appears in all copies, 434 and that both that copyright notice and this permission notice appear in 435 supporting documentation, and that the name of neither Automatrix, 436 Bioreason or Mojam Media be used in advertising or publicity pertaining to 437 distribution of the software without specific, written prior permission. 438 439 440UUencode and UUdecode functions 441------------------------------- 442 443The :mod:`uu` module contains the following notice:: 444 445 Copyright 1994 by Lance Ellinghouse 446 Cathedral City, California Republic, United States of America. 447 All Rights Reserved 448 Permission to use, copy, modify, and distribute this software and its 449 documentation for any purpose and without fee is hereby granted, 450 provided that the above copyright notice appear in all copies and that 451 both that copyright notice and this permission notice appear in 452 supporting documentation, and that the name of Lance Ellinghouse 453 not be used in advertising or publicity pertaining to distribution 454 of the software without specific, written prior permission. 455 LANCE ELLINGHOUSE DISCLAIMS ALL WARRANTIES WITH REGARD TO 456 THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND 457 FITNESS, IN NO EVENT SHALL LANCE ELLINGHOUSE CENTRUM BE LIABLE 458 FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 459 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 460 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 461 OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 462 463 Modified by Jack Jansen, CWI, July 1995: 464 - Use binascii module to do the actual line-by-line conversion 465 between ascii and binary. This results in a 1000-fold speedup. The C 466 version is still 5 times faster, though. 467 - Arguments more compliant with Python standard 468 469 470XML Remote Procedure Calls 471-------------------------- 472 473The :mod:`xmlrpc.client` module contains the following notice:: 474 475 The XML-RPC client interface is 476 477 Copyright (c) 1999-2002 by Secret Labs AB 478 Copyright (c) 1999-2002 by Fredrik Lundh 479 480 By obtaining, using, and/or copying this software and/or its 481 associated documentation, you agree that you have read, understood, 482 and will comply with the following terms and conditions: 483 484 Permission to use, copy, modify, and distribute this software and 485 its associated documentation for any purpose and without fee is 486 hereby granted, provided that the above copyright notice appears in 487 all copies, and that both that copyright notice and this permission 488 notice appear in supporting documentation, and that the name of 489 Secret Labs AB or the author not be used in advertising or publicity 490 pertaining to distribution of the software without specific, written 491 prior permission. 492 493 SECRET LABS AB AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD 494 TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANT- 495 ABILITY AND FITNESS. IN NO EVENT SHALL SECRET LABS AB OR THE AUTHOR 496 BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY 497 DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, 498 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 499 ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 500 OF THIS SOFTWARE. 501 502 503test_epoll 504---------- 505 506The :mod:`test_epoll` module contains the following notice:: 507 508 Copyright (c) 2001-2006 Twisted Matrix Laboratories. 509 510 Permission is hereby granted, free of charge, to any person obtaining 511 a copy of this software and associated documentation files (the 512 "Software"), to deal in the Software without restriction, including 513 without limitation the rights to use, copy, modify, merge, publish, 514 distribute, sublicense, and/or sell copies of the Software, and to 515 permit persons to whom the Software is furnished to do so, subject to 516 the following conditions: 517 518 The above copyright notice and this permission notice shall be 519 included in all copies or substantial portions of the Software. 520 521 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 522 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 523 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 524 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 525 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 526 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 527 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 528 529Select kqueue 530------------- 531 532The :mod:`select` module contains the following notice for the kqueue 533interface:: 534 535 Copyright (c) 2000 Doug White, 2006 James Knight, 2007 Christian Heimes 536 All rights reserved. 537 538 Redistribution and use in source and binary forms, with or without 539 modification, are permitted provided that the following conditions 540 are met: 541 1. Redistributions of source code must retain the above copyright 542 notice, this list of conditions and the following disclaimer. 543 2. Redistributions in binary form must reproduce the above copyright 544 notice, this list of conditions and the following disclaimer in the 545 documentation and/or other materials provided with the distribution. 546 547 THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 548 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 549 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 550 ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 551 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 552 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 553 OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 554 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 555 LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 556 OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 557 SUCH DAMAGE. 558 559 560SipHash24 561--------- 562 563The file :file:`Python/pyhash.c` contains Marek Majkowski' implementation of 564Dan Bernstein's SipHash24 algorithm. It contains the following note:: 565 566 <MIT License> 567 Copyright (c) 2013 Marek Majkowski <marek@popcount.org> 568 569 Permission is hereby granted, free of charge, to any person obtaining a copy 570 of this software and associated documentation files (the "Software"), to deal 571 in the Software without restriction, including without limitation the rights 572 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 573 copies of the Software, and to permit persons to whom the Software is 574 furnished to do so, subject to the following conditions: 575 576 The above copyright notice and this permission notice shall be included in 577 all copies or substantial portions of the Software. 578 </MIT License> 579 580 Original location: 581 https://github.com/majek/csiphash/ 582 583 Solution inspired by code from: 584 Samuel Neves (supercop/crypto_auth/siphash24/little) 585 djb (supercop/crypto_auth/siphash24/little2) 586 Jean-Philippe Aumasson (https://131002.net/siphash/siphash24.c) 587 588 589strtod and dtoa 590--------------- 591 592The file :file:`Python/dtoa.c`, which supplies C functions dtoa and 593strtod for conversion of C doubles to and from strings, is derived 594from the file of the same name by David M. Gay, currently available 595from http://www.netlib.org/fp/. The original file, as retrieved on 596March 16, 2009, contains the following copyright and licensing 597notice:: 598 599 /**************************************************************** 600 * 601 * The author of this software is David M. Gay. 602 * 603 * Copyright (c) 1991, 2000, 2001 by Lucent Technologies. 604 * 605 * Permission to use, copy, modify, and distribute this software for any 606 * purpose without fee is hereby granted, provided that this entire notice 607 * is included in all copies of any software which is or includes a copy 608 * or modification of this software and in all copies of the supporting 609 * documentation for such software. 610 * 611 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED 612 * WARRANTY. IN PARTICULAR, NEITHER THE AUTHOR NOR LUCENT MAKES ANY 613 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY 614 * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE. 615 * 616 ***************************************************************/ 617 618 619OpenSSL 620------- 621 622The modules :mod:`hashlib`, :mod:`posix`, :mod:`ssl`, :mod:`crypt` use 623the OpenSSL library for added performance if made available by the 624operating system. Additionally, the Windows and Mac OS X installers for 625Python may include a copy of the OpenSSL libraries, so we include a copy 626of the OpenSSL license here:: 627 628 629 LICENSE ISSUES 630 ============== 631 632 The OpenSSL toolkit stays under a dual license, i.e. both the conditions of 633 the OpenSSL License and the original SSLeay license apply to the toolkit. 634 See below for the actual license texts. Actually both licenses are BSD-style 635 Open Source licenses. In case of any license issues related to OpenSSL 636 please contact openssl-core@openssl.org. 637 638 OpenSSL License 639 --------------- 640 641 /* ==================================================================== 642 * Copyright (c) 1998-2008 The OpenSSL Project. All rights reserved. 643 * 644 * Redistribution and use in source and binary forms, with or without 645 * modification, are permitted provided that the following conditions 646 * are met: 647 * 648 * 1. Redistributions of source code must retain the above copyright 649 * notice, this list of conditions and the following disclaimer. 650 * 651 * 2. Redistributions in binary form must reproduce the above copyright 652 * notice, this list of conditions and the following disclaimer in 653 * the documentation and/or other materials provided with the 654 * distribution. 655 * 656 * 3. All advertising materials mentioning features or use of this 657 * software must display the following acknowledgment: 658 * "This product includes software developed by the OpenSSL Project 659 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 660 * 661 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 662 * endorse or promote products derived from this software without 663 * prior written permission. For written permission, please contact 664 * openssl-core@openssl.org. 665 * 666 * 5. Products derived from this software may not be called "OpenSSL" 667 * nor may "OpenSSL" appear in their names without prior written 668 * permission of the OpenSSL Project. 669 * 670 * 6. Redistributions of any form whatsoever must retain the following 671 * acknowledgment: 672 * "This product includes software developed by the OpenSSL Project 673 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 674 * 675 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 676 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 677 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 678 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 679 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 680 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 681 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 682 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 683 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 684 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 685 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 686 * OF THE POSSIBILITY OF SUCH DAMAGE. 687 * ==================================================================== 688 * 689 * This product includes cryptographic software written by Eric Young 690 * (eay@cryptsoft.com). This product includes software written by Tim 691 * Hudson (tjh@cryptsoft.com). 692 * 693 */ 694 695 Original SSLeay License 696 ----------------------- 697 698 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 699 * All rights reserved. 700 * 701 * This package is an SSL implementation written 702 * by Eric Young (eay@cryptsoft.com). 703 * The implementation was written so as to conform with Netscapes SSL. 704 * 705 * This library is free for commercial and non-commercial use as long as 706 * the following conditions are aheared to. The following conditions 707 * apply to all code found in this distribution, be it the RC4, RSA, 708 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 709 * included with this distribution is covered by the same copyright terms 710 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 711 * 712 * Copyright remains Eric Young's, and as such any Copyright notices in 713 * the code are not to be removed. 714 * If this package is used in a product, Eric Young should be given attribution 715 * as the author of the parts of the library used. 716 * This can be in the form of a textual message at program startup or 717 * in documentation (online or textual) provided with the package. 718 * 719 * Redistribution and use in source and binary forms, with or without 720 * modification, are permitted provided that the following conditions 721 * are met: 722 * 1. Redistributions of source code must retain the copyright 723 * notice, this list of conditions and the following disclaimer. 724 * 2. Redistributions in binary form must reproduce the above copyright 725 * notice, this list of conditions and the following disclaimer in the 726 * documentation and/or other materials provided with the distribution. 727 * 3. All advertising materials mentioning features or use of this software 728 * must display the following acknowledgement: 729 * "This product includes cryptographic software written by 730 * Eric Young (eay@cryptsoft.com)" 731 * The word 'cryptographic' can be left out if the rouines from the library 732 * being used are not cryptographic related :-). 733 * 4. If you include any Windows specific code (or a derivative thereof) from 734 * the apps directory (application code) you must include an acknowledgement: 735 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 736 * 737 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 738 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 739 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 740 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 741 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 742 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 743 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 744 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 745 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 746 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 747 * SUCH DAMAGE. 748 * 749 * The licence and distribution terms for any publically available version or 750 * derivative of this code cannot be changed. i.e. this code cannot simply be 751 * copied and put under another distribution licence 752 * [including the GNU Public Licence.] 753 */ 754 755 756expat 757----- 758 759The :mod:`pyexpat` extension is built using an included copy of the expat 760sources unless the build is configured ``--with-system-expat``:: 761 762 Copyright (c) 1998, 1999, 2000 Thai Open Source Software Center Ltd 763 and Clark Cooper 764 765 Permission is hereby granted, free of charge, to any person obtaining 766 a copy of this software and associated documentation files (the 767 "Software"), to deal in the Software without restriction, including 768 without limitation the rights to use, copy, modify, merge, publish, 769 distribute, sublicense, and/or sell copies of the Software, and to 770 permit persons to whom the Software is furnished to do so, subject to 771 the following conditions: 772 773 The above copyright notice and this permission notice shall be included 774 in all copies or substantial portions of the Software. 775 776 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 777 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 778 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 779 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 780 CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 781 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 782 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 783 784 785libffi 786------ 787 788The :mod:`_ctypes` extension is built using an included copy of the libffi 789sources unless the build is configured ``--with-system-libffi``:: 790 791 Copyright (c) 1996-2008 Red Hat, Inc and others. 792 793 Permission is hereby granted, free of charge, to any person obtaining 794 a copy of this software and associated documentation files (the 795 ``Software''), to deal in the Software without restriction, including 796 without limitation the rights to use, copy, modify, merge, publish, 797 distribute, sublicense, and/or sell copies of the Software, and to 798 permit persons to whom the Software is furnished to do so, subject to 799 the following conditions: 800 801 The above copyright notice and this permission notice shall be included 802 in all copies or substantial portions of the Software. 803 804 THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, 805 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 806 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 807 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 808 HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 809 WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 810 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 811 DEALINGS IN THE SOFTWARE. 812 813 814zlib 815---- 816 817The :mod:`zlib` extension is built using an included copy of the zlib 818sources if the zlib version found on the system is too old to be 819used for the build:: 820 821 Copyright (C) 1995-2011 Jean-loup Gailly and Mark Adler 822 823 This software is provided 'as-is', without any express or implied 824 warranty. In no event will the authors be held liable for any damages 825 arising from the use of this software. 826 827 Permission is granted to anyone to use this software for any purpose, 828 including commercial applications, and to alter it and redistribute it 829 freely, subject to the following restrictions: 830 831 1. The origin of this software must not be misrepresented; you must not 832 claim that you wrote the original software. If you use this software 833 in a product, an acknowledgment in the product documentation would be 834 appreciated but is not required. 835 836 2. Altered source versions must be plainly marked as such, and must not be 837 misrepresented as being the original software. 838 839 3. This notice may not be removed or altered from any source distribution. 840 841 Jean-loup Gailly Mark Adler 842 jloup@gzip.org madler@alumni.caltech.edu 843 844 845cfuhash 846------- 847 848The implementation of the hash table used by the :mod:`tracemalloc` is based 849on the cfuhash project:: 850 851 Copyright (c) 2005 Don Owens 852 All rights reserved. 853 854 This code is released under the BSD license: 855 856 Redistribution and use in source and binary forms, with or without 857 modification, are permitted provided that the following conditions 858 are met: 859 860 * Redistributions of source code must retain the above copyright 861 notice, this list of conditions and the following disclaimer. 862 863 * Redistributions in binary form must reproduce the above 864 copyright notice, this list of conditions and the following 865 disclaimer in the documentation and/or other materials provided 866 with the distribution. 867 868 * Neither the name of the author nor the names of its 869 contributors may be used to endorse or promote products derived 870 from this software without specific prior written permission. 871 872 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 873 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 874 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 875 FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 876 COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 877 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 878 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 879 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 880 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 881 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 882 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 883 OF THE POSSIBILITY OF SUCH DAMAGE. 884 885 886libmpdec 887-------- 888 889The :mod:`_decimal` module is built using an included copy of the libmpdec 890library unless the build is configured ``--with-system-libmpdec``:: 891 892 Copyright (c) 2008-2016 Stefan Krah. All rights reserved. 893 894 Redistribution and use in source and binary forms, with or without 895 modification, are permitted provided that the following conditions 896 are met: 897 898 1. Redistributions of source code must retain the above copyright 899 notice, this list of conditions and the following disclaimer. 900 901 2. Redistributions in binary form must reproduce the above copyright 902 notice, this list of conditions and the following disclaimer in the 903 documentation and/or other materials provided with the distribution. 904 905 THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND 906 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 907 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 908 ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 909 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 910 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 911 OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 912 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 913 LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 914 OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 915 SUCH DAMAGE. 916