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- Note: The type hints included in this package come from the typeshed project,
- and are hence distributed under the Apache License 2.0 rather than under the
- Python Software License that covers the module implementation and test suite.
- A. HISTORY OF THE SOFTWARE
- ==========================
- contextlib2 is a derivative of the contextlib module distributed by the PSF
- as part of the Python standard library. According, it is itself redistributed
- under the PSF license (reproduced in full below). As the contextlib module
- was added only in Python 2.5, the licenses for earlier Python versions are
- not applicable and have not been included.
- 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 that included the contextlib module.
- Release Derived Year Owner GPL-
- from compatible? (1)
- 2.5 2.4 2006 PSF yes
- 2.5.1 2.5 2007 PSF yes
- 2.5.2 2.5.1 2008 PSF yes
- 2.5.3 2.5.2 2008 PSF yes
- 2.6 2.5 2008 PSF yes
- 2.6.1 2.6 2008 PSF yes
- 2.6.2 2.6.1 2009 PSF yes
- 2.6.3 2.6.2 2009 PSF yes
- 2.6.4 2.6.3 2009 PSF yes
- 2.6.5 2.6.4 2010 PSF yes
- 3.0 2.6 2008 PSF yes
- 3.0.1 3.0 2009 PSF yes
- 3.1 3.0.1 2009 PSF yes
- 3.1.1 3.1 2009 PSF yes
- 3.1.2 3.1.1 2010 PSF yes
- 3.1.3 3.1.2 2010 PSF yes
- 3.1.4 3.1.3 2011 PSF yes
- 3.2 3.1 2011 PSF yes
- 3.2.1 3.2 2011 PSF yes
- 3.2.2 3.2.1 2011 PSF yes
- 3.3 3.2 2012 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.
- 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, 2008, 2009, 2010,
- 2011 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.
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