Licenses:PSF - ArchWiki

# Licenses:PSF

For quick reference, the text of the Python Software Foundation License (PSF) as distributed with Arch Linux:

    A. HISTORY OF THE SOFTWARE
    ==========================

    Python was created in the early 1990s by Guido van Rossum at Stichting
    Mathematisch Centrum (CWI, see http://www.cwi.nl) in the Netherlands
    as a successor of a language called ABC.  Guido remains Python's
    principal author, although it includes many contributions from others.

    In 1995, Guido continued his work on Python at the Corporation for
    National Research Initiatives (CNRI, see http://www.cnri.reston.va.us)
    in Reston, Virginia where he released several versions of the
    software.

    In May 2000, Guido and the Python core development team moved to
    BeOpen.com to form the BeOpen PythonLabs team.  In October of the same
    year, the PythonLabs team moved to Digital Creations (now Zope
    Corporation, see http://www.zope.com).  In 2001, the Python Software
    Foundation (PSF, see http://www.python.org/psf/) was formed, a
    non-profit organization created specifically to own Python-related
    Intellectual Property.  Zope Corporation is a sponsoring member of
    the PSF.

    All Python releases are Open Source (see http://www.opensource.org for
    the Open Source Definition).  Historically, most, but not all, Python
    releases have also been GPL-compatible; the table below summarizes
    the various releases.

        Release         Derived     Year        Owner       GPL-
                        from                                compatible? (1)

        0.9.0 thru 1.2              1991-1995   CWI         yes
        1.3 thru 1.5.2  1.2         1995-1999   CNRI        yes
        1.6             1.5.2       2000        CNRI        no
        2.0             1.6         2000        BeOpen.com  no
        1.6.1           1.6         2001        CNRI        yes (2)
        2.1             2.0+1.6.1   2001        PSF         no
        2.0.1           2.0+1.6.1   2001        PSF         yes
        2.1.1           2.1+2.0.1   2001        PSF         yes
        2.2             2.1.1       2001        PSF         yes
        2.1.2           2.1.1       2002        PSF         yes
        2.1.3           2.1.2       2002        PSF         yes
        2.2.1           2.2         2002        PSF         yes
        2.2.2           2.2.1       2002        PSF         yes
        2.2.3           2.2.2       2003        PSF         yes
        2.3             2.2.2       2002-2003   PSF         yes
        2.3.1           2.3         2002-2003   PSF         yes
        2.3.2           2.3.1       2002-2003   PSF         yes
        2.3.3           2.3.2       2002-2003   PSF         yes
        2.3.4           2.3.3       2004        PSF         yes
        2.3.5           2.3.4       2005        PSF         yes
        2.4             2.3         2004        PSF         yes
        2.4.1           2.4         2005        PSF         yes
        2.4.2           2.4.1       2005        PSF         yes
        2.4.3           2.4.2       2006        PSF         yes
        2.5             2.4         2006        PSF         yes
        2.5.1           2.5         2007        PSF         yes

    Footnotes:

    (1) GPL-compatible doesn't mean that we're distributing Python under
        the GPL.  All Python licenses, unlike the GPL, let you distribute
        a modified version without making your changes open source.  The
        GPL-compatible licenses make it possible to combine Python with
        other software that is released under the GPL; the others don't.

    (2) According to Richard Stallman, 1.6.1 is not GPL-compatible,
        because its license has a choice of law clause.  According to
        CNRI, however, Stallman's lawyer has told CNRI's lawyer that 1.6.1
        is "not incompatible" with the GPL.

    Thanks to the many outside volunteers who have worked under Guido's
    direction to make these releases possible.

    B. TERMS AND CONDITIONS FOR ACCESSING OR OTHERWISE USING PYTHON
    ===============================================================

    PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2
    --------------------------------------------

    1. This LICENSE AGREEMENT is between the Python Software Foundation
    ("PSF"), and the Individual or Organization ("Licensee") accessing and
    otherwise using this software ("Python") in source or binary form and
    its associated documentation.

    2. Subject to the terms and conditions of this License Agreement, PSF
    hereby grants Licensee a nonexclusive, royalty-free, world-wide
    license to reproduce, analyze, test, perform and/or display publicly,
    prepare derivative works, distribute, and otherwise use Python
    alone or in any derivative version, provided, however, that PSF's
    License Agreement and PSF's notice of copyright, i.e., "Copyright (c)
    2001, 2002, 2003, 2004, 2005, 2006, 2007 Python Software Foundation;
    All Rights Reserved" are retained in Python alone or in any derivative
    version prepared by Licensee.

    3. In the event Licensee prepares a derivative work that is based on
    or incorporates Python or any part thereof, and wants to make
    the derivative work available to others as provided herein, then
    Licensee hereby agrees to include in any such work a brief summary of
    the changes made to Python.

    4. PSF is making Python available to Licensee on an "AS IS"
    basis.  PSF MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
    IMPLIED.  BY WAY OF EXAMPLE, BUT NOT LIMITATION, PSF MAKES NO AND
    DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
    FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON WILL NOT
    INFRINGE ANY THIRD PARTY RIGHTS.

    5. PSF SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON
    FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS
    A RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON,
    OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.

    6. This License Agreement will automatically terminate upon a material
    breach of its terms and conditions.

    7. Nothing in this License Agreement shall be deemed to create any
    relationship of agency, partnership, or joint venture between PSF and
    Licensee.  This License Agreement does not grant permission to use PSF
    trademarks or trade name in a trademark sense to endorse or promote
    products or services of Licensee, or any third party.

    8. By copying, installing or otherwise using Python, Licensee
    agrees to be bound by the terms and conditions of this License
    Agreement.

    BEOPEN.COM LICENSE AGREEMENT FOR PYTHON 2.0
    -------------------------------------------

    BEOPEN PYTHON OPEN SOURCE LICENSE AGREEMENT VERSION 1

    1. This LICENSE AGREEMENT is between BeOpen.com ("BeOpen"), having an
    office at 160 Saratoga Avenue, Santa Clara, CA 95051, and the
    Individual or Organization ("Licensee") accessing and otherwise using
    this software in source or binary form and its associated
    documentation ("the Software").

    2. Subject to the terms and conditions of this BeOpen Python License
    Agreement, BeOpen hereby grants Licensee a non-exclusive,
    royalty-free, world-wide license to reproduce, analyze, test, perform
    and/or display publicly, prepare derivative works, distribute, and
    otherwise use the Software alone or in any derivative version,
    provided, however, that the BeOpen Python License is retained in the
    Software, alone or in any derivative version prepared by Licensee.

    3. BeOpen is making the Software available to Licensee on an "AS IS"
    basis.  BEOPEN MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
    IMPLIED.  BY WAY OF EXAMPLE, BUT NOT LIMITATION, BEOPEN MAKES NO AND
    DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
    FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF THE SOFTWARE WILL NOT
    INFRINGE ANY THIRD PARTY RIGHTS.

    4. BEOPEN SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF THE
    SOFTWARE FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS
    AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THE SOFTWARE, OR ANY
    DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.

    5. This License Agreement will automatically terminate upon a material
    breach of its terms and conditions.

    6. This License Agreement shall be governed by and interpreted in all
    respects by the law of the State of California, excluding conflict of
    law provisions.  Nothing in this License Agreement shall be deemed to
    create any relationship of agency, partnership, or joint venture
    between BeOpen and Licensee.  This License Agreement does not grant
    permission to use BeOpen trademarks or trade names in a trademark
    sense to endorse or promote products or services of Licensee, or any
    third party.  As an exception, the "BeOpen Python" logos available at
    http://www.pythonlabs.com/logos.html may be used according to the
    permissions granted on that web page.

    7. By copying, installing or otherwise using the software, Licensee
    agrees to be bound by the terms and conditions of this License
    Agreement.

    CNRI LICENSE AGREEMENT FOR PYTHON 1.6.1
    ---------------------------------------

    1. This LICENSE AGREEMENT is between the Corporation for National
    Research Initiatives, having an office at 1895 Preston White Drive,
    Reston, VA 20191 ("CNRI"), and the Individual or Organization
    ("Licensee") accessing and otherwise using Python 1.6.1 software in
    source or binary form and its associated documentation.

    2. Subject to the terms and conditions of this License Agreement, CNRI
    hereby grants Licensee a nonexclusive, royalty-free, world-wide
    license to reproduce, analyze, test, perform and/or display publicly,
    prepare derivative works, distribute, and otherwise use Python 1.6.1
    alone or in any derivative version, provided, however, that CNRI's
    License Agreement and CNRI's notice of copyright, i.e., "Copyright (c)
    1995-2001 Corporation for National Research Initiatives; All Rights
    Reserved" are retained in Python 1.6.1 alone or in any derivative
    version prepared by Licensee.  Alternately, in lieu of CNRI's License
    Agreement, Licensee may substitute the following text (omitting the
    quotes): "Python 1.6.1 is made available subject to the terms and
    conditions in CNRI's License Agreement.  This Agreement together with
    Python 1.6.1 may be located on the Internet using the following
    unique, persistent identifier (known as a handle): 1895.22/1013.  This
    Agreement may also be obtained from a proxy server on the Internet
    using the following URL: http://hdl.handle.net/1895.22/1013".

    3. In the event Licensee prepares a derivative work that is based on
    or incorporates Python 1.6.1 or any part thereof, and wants to make
    the derivative work available to others as provided herein, then
    Licensee hereby agrees to include in any such work a brief summary of
    the changes made to Python 1.6.1.

    4. CNRI is making Python 1.6.1 available to Licensee on an "AS IS"
    basis.  CNRI MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
    IMPLIED.  BY WAY OF EXAMPLE, BUT NOT LIMITATION, CNRI MAKES NO AND
    DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
    FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON 1.6.1 WILL NOT
    INFRINGE ANY THIRD PARTY RIGHTS.

    5. CNRI SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON
    1.6.1 FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS
    A RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON 1.6.1,
    OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.

    6. This License Agreement will automatically terminate upon a material
    breach of its terms and conditions.

    7. This License Agreement shall be governed by the federal
    intellectual property law of the United States, including without
    limitation the federal copyright law, and, to the extent such
    U.S. federal law does not apply, by the law of the Commonwealth of
    Virginia, excluding Virginia's conflict of law provisions.
    Notwithstanding the foregoing, with regard to derivative works based
    on Python 1.6.1 that incorporate non-separable material that was
    previously distributed under the GNU General Public License (GPL), the
    law of the Commonwealth of Virginia shall govern this License
    Agreement only as to issues arising under or with respect to
    Paragraphs 4, 5, and 7 of this License Agreement.  Nothing in this
    License Agreement shall be deemed to create any relationship of
    agency, partnership, or joint venture between CNRI and Licensee.  This
    License Agreement does not grant permission to use CNRI trademarks or
    trade name in a trademark sense to endorse or promote products or
    services of Licensee, or any third party.

    8. By clicking on the "ACCEPT" button where indicated, or by copying,
    installing or otherwise using Python 1.6.1, Licensee agrees to be
    bound by the terms and conditions of this License Agreement.

            ACCEPT

    CWI LICENSE AGREEMENT FOR PYTHON 0.9.0 THROUGH 1.2
    --------------------------------------------------

    Copyright (c) 1991 - 1995, Stichting Mathematisch Centrum Amsterdam,
    The Netherlands.  All rights reserved.

    Permission to use, copy, modify, and distribute this software and its
    documentation for any purpose and without fee is hereby granted,
    provided that the above copyright notice appear in all copies and that
    both that copyright notice and this permission notice appear in
    supporting documentation, and that the name of Stichting Mathematisch
    Centrum or CWI not be used in advertising or publicity pertaining to
    distribution of the software without specific, written prior
    permission.

    STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
    THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
    FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
    FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
    OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

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