A new attempt at rationalizing the "history of the software" section,
with a table clarifying which releases are GPL-compatible. Also unified the headings for the various licenses.
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Guido van Rossum
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@ -2,33 +2,48 @@ A. HISTORY OF THE SOFTWARE
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==========================
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Python was created in the early 1990s by Guido van Rossum at Stichting
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Mathematisch Centrum (CWI) in the Netherlands as a successor of a
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language called ABC. Guido is Python's principal author, although it
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includes many contributions from others. The last version released
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from CWI was Python 1.2. In 1995, Guido continued his work on Python
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at the Corporation for National Research Initiatives (CNRI) in Reston,
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Virginia where he released several versions of the software. Python
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1.6 was the last of the versions released by CNRI. In 2000, Guido and
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the Python core development team moved to BeOpen.com to form the
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BeOpen PythonLabs team. Python 2.0 was the first and only release
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from BeOpen.com.
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Mathematisch Centrum (CWI, see http://www.cwi.nl) in the Netherlands
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as a successor of a language called ABC. Guido remains Python's
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principal author, although it includes many contributions from others.
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Following the release of Python 1.6, and after Guido van Rossum left
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CNRI to work with commercial software developers, it became clear that
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the ability to use Python with software available under the GNU Public
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License (GPL) was very desirable. CNRI and the Free Software
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Foundation (FSF) interacted to develop enabling wording changes to the
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Python license. Python 1.6.1 is essentially the same as Python 1.6,
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with a few minor bug fixes, and with a different license that enables
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later versions to be GPL-compatible. Python 2.1 is a derivative work
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of Python 1.6.1, as well as of Python 2.0.
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In 1995, Guido continued his work on Python at the Corporation for
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National Research Initiatives (CNRI, see http://www.cnri.reston.va.us)
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in Reston, Virginia where he released several versions of the
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software.
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After Python 2.0 was released by BeOpen.com, Guido van Rossum and the
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other PythonLabs developers joined Digital Creations. All
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intellectual property added from this point on, including Python
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2.0.1, is owned by the Python Software Foundation (PSF), a non-profit
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modeled after the Apache Software Foundation. See
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http://www.python.org/psf/ for more information about the PSF.
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In May 2000, Guido and the Python core development team moved to
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BeOpen.com to form the BeOpen PythonLabs team. In October of the same
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year, the PythonLabs team moved to Digital Creations (see
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http://www.digicool.com). In 2001, the Python Software Foundation
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(PSF, see http://www.python.org/psf/) was formed, a non-profit
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organization created specifically to own Python-related Intellectual
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Property. Digital Creations is a sponsoring member of the PSF.
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All Python releases are Open Source (see http://www.opensource.org for
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the Open Source Definition). Historically, most, but not all, Python
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releases have also been GPL-compatible; the table below summarizes
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the various releases.
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Release Derived Year Owner GPL-
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from compatible? (1)
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0.9.0 thru 1.2 1991-1995 CWI yes
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1.3 thru 1.5.2 1.2 1995-1999 CNRI yes
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1.6 1.5.2 2000 CNRI no
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2.0 1.6 2000 BeOpen.com no
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1.6.1 1.6 2001 CNRI no
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2.1 2.0+1.6.1 2001 PSF no
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2.0.1 2.0+1.6.1 2001 PSF yes
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2.1.1 2.1+2.0.1 2001 PSF yes
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2.2 2.1.1 2001 PSF yes
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Footnotes:
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(1) GPL-compatible doesn't mean that we're distributing Python under
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the GPL. All Python licenses, unlike the GPL, let you distribute
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a modified version without making your changes open source. The
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GPL-compatible licenses make it possible to combine Python with
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other software that is released under the GPL; the others don't.
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Thanks to the many outside volunteers who have worked under Guido's
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direction to make these releases possible.
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@ -37,39 +52,39 @@ direction to make these releases possible.
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B. TERMS AND CONDITIONS FOR ACCESSING OR OTHERWISE USING PYTHON
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===============================================================
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PSF LICENSE AGREEMENT
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---------------------
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PSF LICENSE AGREEMENT FOR PYTHON 2.2
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------------------------------------
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1. This LICENSE AGREEMENT is between the Python Software Foundation
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("PSF"), and the Individual or Organization ("Licensee") accessing and
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otherwise using Python 2.1 software in source or binary form and its
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otherwise using Python 2.2 software in source or binary form and its
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associated documentation.
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2. Subject to the terms and conditions of this License Agreement, PSF
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hereby grants Licensee a nonexclusive, royalty-free, world-wide
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license to reproduce, analyze, test, perform and/or display publicly,
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prepare derivative works, distribute, and otherwise use Python 2.1
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prepare derivative works, distribute, and otherwise use Python 2.2
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alone or in any derivative version, provided, however, that PSF's
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License Agreement and PSF's notice of copyright, i.e., "Copyright (c)
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2001 Python Software Foundation; All Rights Reserved" are retained in
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Python 2.1 alone or in any derivative version prepared by Licensee.
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Python 2.2 alone or in any derivative version prepared by Licensee.
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3. In the event Licensee prepares a derivative work that is based on
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or incorporates Python 2.1 or any part thereof, and wants to make
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or incorporates Python 2.2 or any part thereof, and wants to make
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the derivative work available to others as provided herein, then
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Licensee hereby agrees to include in any such work a brief summary of
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the changes made to Python 2.1.
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the changes made to Python 2.2.
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4. PSF is making Python 2.1 available to Licensee on an "AS IS"
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4. PSF is making Python 2.2 available to Licensee on an "AS IS"
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basis. PSF MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
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IMPLIED. BY WAY OF EXAMPLE, BUT NOT LIMITATION, PSF MAKES NO AND
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DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
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FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON 2.1 WILL NOT
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FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON 2.2 WILL NOT
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INFRINGE ANY THIRD PARTY RIGHTS.
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5. PSF SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON
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2.1 FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS
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A RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON 2.1,
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2.2 FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS
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A RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON 2.2,
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OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.
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6. This License Agreement will automatically terminate upon a material
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@ -81,13 +96,13 @@ Licensee. This License Agreement does not grant permission to use PSF
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trademarks or trade name in a trademark sense to endorse or promote
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products or services of Licensee, or any third party.
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8. By copying, installing or otherwise using Python 2.1, Licensee
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8. By copying, installing or otherwise using Python 2.2, Licensee
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agrees to be bound by the terms and conditions of this License
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Agreement.
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BEOPEN.COM TERMS AND CONDITIONS FOR PYTHON 2.0
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----------------------------------------------
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BEOPEN.COM LICENSE AGREEMENT FOR PYTHON 2.0
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-------------------------------------------
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BEOPEN PYTHON OPEN SOURCE LICENSE AGREEMENT VERSION 1
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@ -136,8 +151,8 @@ agrees to be bound by the terms and conditions of this License
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Agreement.
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CNRI OPEN SOURCE GPL-COMPATIBLE LICENSE AGREEMENT
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-------------------------------------------------
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CNRI LICENSE AGREEMENT FOR PYTHON 1.6.1
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---------------------------------------
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1. This LICENSE AGREEMENT is between the Corporation for National
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Research Initiatives, having an office at 1895 Preston White Drive,
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@ -207,8 +222,8 @@ bound by the terms and conditions of this License Agreement.
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ACCEPT
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CWI PERMISSIONS STATEMENT AND DISCLAIMER
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----------------------------------------
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CWI LICENSE AGREEMENT FOR PYTHON 0.9.0 THROUGH 1.2
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--------------------------------------------------
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Copyright (c) 1991 - 1995, Stichting Mathematisch Centrum Amsterdam,
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The Netherlands. All rights reserved.
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