LICENSE

                                 Apache License
                           Version 2.0, January 2004
                        http://www.apache.org/licenses/

   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION

   1. Definitions.

      "License" shall mean the terms and conditions for use, reproduction,
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   APPENDIX: How to apply the Apache License to your work.

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=======================================================================
Apache MADlib Subcomponents:

The Apache MADlib project contains subcomponents with separate
copyright notices and license terms. Your use of the source code for
these subcomponents is subject to the terms and conditions of the
following licenses.

***********************************************************************

Source code under src/libstemmer is taken from Snowball stem project
and is available under the following license:

Copyright (c) 2001, Dr Martin Porter,
Copyright (c) 2002, Richard Boulton.
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:

1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.

3. Neither the name of the copyright holder nor the names of its
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.

***********************************************************************

Source code under src/madpack/yaml is taken from PyYAML project and is
available under the MIT license:

Copyright (c) 2006 Kirill Simonov

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

***********************************************************************

Source code under cmake/UseLATEX.cmake is taken from LaTeX project and is
available under the following license:

Copyright 2004, 2015 Sandia Corporation.
Under the terms of Contract DE-AC04-94AL85000, there is a non-exclusive
license for use of this work by or on behalf of the U.S. Government.

This software is released under the BSD 3-Clause License.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:

1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.

3. Neither the name of the copyright holder nor the names of its
contributors may be used to endorse or promote products derived from this
software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

***********************************************************************

The rest of the source code, unless explicitly marked with an Apache License
header, should be assumed to be coming from previous life of MADlib as a
BSD licensed project and is available under the following license:

Portions of this software Copyright (c) 2010-2013 by EMC Corporation.  All rights reserved.
Portions of this software Copyright (c) 2010-2013 by Regents of the University of California.  All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

- Redistributions of source code must retain the above copyright notice,
  this list of conditions and the following disclaimer.

- Redistributions in binary form must reproduce the above copyright
  notice, this list of conditions and the following disclaimer in the
  documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.

***********************************************************************

The binary distribution of MADlib statically links and otherwise ships
code available under the following licenses (either directly compatible 
with Apache License version 2, or explicitly approved by Apache Software 
Foundation to be compatible with inclusion in a binary form within an 
Apache product if the inclusion is appropriately labeled):

----------------------------------------------------------------------------
Boost Software License - Version 1.0 - August 17th, 2003

Permission is hereby granted, free of charge, to any person or organization
obtaining a copy of the software and accompanying documentation covered by
this license (the "Software") to use, reproduce, display, distribute,
execute, and transmit the Software, and to prepare derivative works of the
Software, and to permit third-parties to whom the Software is furnished to
do so, all subject to the following:

The copyright notices in the Software and this entire statement, including
the above license grant, this restriction and the following disclaimer,
must be included in all copies of the Software, in whole or in part, and
all derivative works of the Software, unless such copies or derivative
works are solely in the form of machine-executable object code generated by
a source language processor.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
----------------------------------------------------------------------------
Eigen

From the Eigen Licensing page
(http://eigen.tuxfamily.org/index.php?title=Main_Page)

Eigen is Free Software. Starting from the 3.1.1 version, it is licensed 
under the MPL2, which is a simple weak copyleft license.  Common 
questions about the MPL2 are answered in the official MPL2 FAQ 
(http://www.mozilla.org/MPL/2.0/FAQ.html).

Note that currently, a few features rely on third-party code licensed 
under the LGPL: SimplicialCholesky, AMD ordering, and constrained_cg. 
Such features can be explicitly disabled by compiling with the 
EIGEN_MPL2_ONLY preprocessor symbol defined.   

Virtually any software may use Eigen. For example, closed-source 
software may use Eigen without having to disclose its own source code. 
Many proprietary and closed-source software projects are using Eigen 
right now, as well as many BSD-licensed projects.

------

Mozilla Public License
Version 2.0

1. Definitions

1.1. “Contributor”
means each individual or legal entity that creates, contributes to the 
creation of, or owns Covered Software.

1.2. “Contributor Version”
means the combination of the Contributions of others (if any) used by 
a Contributor and that particular Contributor’s Contribution.

1.3. “Contribution”
means Covered Software of a particular Contributor.

1.4. “Covered Software”
means Source Code Form to which the initial Contributor has attached 
the notice in Exhibit A, the Executable Form of such Source Code Form, 
and Modifications of such Source Code Form, in each case including 
portions thereof.

1.5. “Incompatible With Secondary Licenses”
means

• that the initial Contributor has attached the notice described in 
Exhibit B to the Covered Software; or

• that the Covered Software was made available under the terms of 
version 1.1 or earlier of the License, but not also under the terms of 
a Secondary License.

1.6. “Executable Form”
means any form of the work other than Source Code Form.

1.7. “Larger Work”
means a work that combines Covered Software with other material, in a 
separate file or files, that is not Covered Software.

1.8. “License”
means this document.

1.9. “Licensable”
means having the right to grant, to the maximum extent possible, 
whether at the time of the initial grant or subsequently, any and all 
of the rights conveyed by this License.

1.10. “Modifications”
means any of the following:

• any file in Source Code Form that results from an addition to, 
deletion from, or modification of the contents of Covered Software; or

• any new file in Source Code Form that contains any Covered Software.

1.11. “Patent Claims” of a Contributor
means any patent claim(s), including without limitation, method, 
process, and apparatus claims, in any patent Licensable by such 
Contributor that would be infringed, but for the grant of the License, 
by the making, using, selling, offering for sale, having made, import, 
or transfer of either its Contributions or its Contributor Version.

1.12. “Secondary License”
means either the GNU General Public License, Version 2.0, the GNU 
Lesser General Public License, Version 2.1, the GNU Affero General 
Public License, Version 3.0, or any later versions of those licenses.

1.13. “Source Code Form”
means the form of the work preferred for making modifications.

1.14. “You” (or “Your”)
means an individual or a legal entity exercising rights under this 
License. For legal entities, “You” includes any entity that 
controls, is controlled by, or is under common control with You. For  
purposes of this definition, “control” means (a) the power, direct or 
indirect, to cause the direction or management of such entity, whether 
by contract or otherwise, or (b) ownership of more than fifty percent 
(50%) of the outstanding shares or beneficial ownership of such entity.

2. License Grants and Conditions

2.1. Grants

Each Contributor hereby grants You a world-wide, royalty-free, 
non-exclusive license:

• under intellectual property rights (other than patent or trademark) 
Licensable by such Contributor to use, reproduce, make available, 
modify, display, perform, distribute, and otherwise exploit its 
Contributions, either on an unmodified basis, with Modifications, or as 
part of a Larger Work; and

• under Patent Claims of such Contributor to make, use, sell, offer 
for sale, have made, import, and otherwise transfer either its 
Contributions or its Contributor Version.

2.2. Effective Date

The licenses granted in Section 2.1 with respect to any Contribution 
become effective for each Contribution on the date the Contributor 
first distributes such Contribution.

2.3. Limitations on Grant Scope

The licenses granted in this Section 2 are the only rights granted 
under this License. No additional rights or licenses will be implied 
from the distribution or licensing of Covered Software under this 
License. Notwithstanding Section 2.1(b) above, no patent license is 
granted by a Contributor:

• for any code that a Contributor has removed from Covered Software; 
or

• for infringements caused by: (i) Your and any other third party’s 
modifications of Covered Software, or (ii) the combination of its 
Contributions with other software (except as part of its Contributor 
Version); or

• under Patent Claims infringed by Covered Software in the absence of 
its Contributions.

This License does not grant any rights in the trademarks, service 
marks, or logos of any Contributor (except as may be necessary to 
comply with the notice requirements in Section 3.4).

2.4. Subsequent Licenses

No Contributor makes additional grants as a result of Your choice to 
distribute the Covered Software under a subsequent version of this 
License (see Section 10.2) or under the terms of a Secondary License 
(if permitted under the terms of Section 3.3).

2.5. Representation

Each Contributor represents that the Contributor believes its 
Contributions are its original creation(s) or it has sufficient rights 
to grant the rights to its Contributions conveyed by this License.

2.6. Fair Use

This License is not intended to limit any rights You have under 
applicable copyright doctrines of fair use, fair dealing, or other 
equivalents.

2.7. Conditions

Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted 
in Section 2.1.

3. Responsibilities

3.1. Distribution of Source Form

All distribution of Covered Software in Source Code Form, including any 
Modifications that You create or to which You contribute, must be under 
the terms of this License. You must inform recipients that the Source 
Code Form of the Covered Software is governed by the terms of this 
License, and how they can obtain a copy of this License. You may not 
attempt to alter or restrict the recipients’ rights in the Source Code 
Form.

3.2. Distribution of Executable Form

If You distribute Covered Software in Executable Form then:

• such Covered Software must also be made available in Source Code 
Form, as described in Section 3.1, and You must inform recipients of 
the Executable Form how they can obtain a copy of such Source Code Form 
by reasonable means in a timely manner, at a charge no more than the 
cost of distribution to the recipient; and

• You may distribute such Executable Form under the terms of this 
License, or sublicense it under different terms, provided that the 
license for the Executable Form does not attempt to limit or alter the 
recipients’ rights in the Source Code Form under this License.

3.3. Distribution of a Larger Work

You may create and distribute a Larger Work under terms of Your choice, 
provided that You also comply with the requirements of this License for 
the Covered Software. If the Larger Work is a combination of Covered 
Software with a work governed by one or more Secondary Licenses, and 
the Covered Software is not Incompatible With Secondary Licenses, this 
License permits You to additionally distribute such Covered Software 
under the terms of such Secondary License(s), so that the recipient of 
the Larger Work may, at their option, further distribute the Covered 
Software under the terms of either this License or such Secondary 
License(s).

3.4. Notices

You may not remove or alter the substance of any license notices 
(including copyright notices, patent notices, disclaimers of warranty, 
or limitations of liability) contained within the Source Code Form of 
the Covered Software, except that You may alter any license notices to 
the extent required to remedy known factual inaccuracies.

3.5. Application of Additional Terms

You may choose to offer, and to charge a fee for, warranty, support, 
indemnity or liability obligations to one or more recipients of Covered 
Software. However, You may do so only on Your own behalf, and not on 
behalf of any Contributor. You must make it absolutely clear that any 
such warranty, support, indemnity, or liability obligation is offered 
by You alone, and You hereby agree to indemnify every Contributor for 
any liability incurred by such Contributor as a result of warranty, 
support, indemnity or liability terms You offer. You may include 
additional disclaimers of warranty and limitations of liability 
specific to any jurisdiction.

4. Inability to Comply Due to Statute or Regulation

If it is impossible for You to comply with any of the terms of this 
License with respect to some or all of the Covered Software due to 
statute, judicial order, or regulation then You must: (a) comply with  
the terms of this License to the maximum extent possible; and (b) 
describe the limitations and the code they affect. Such description 
must be placed in a text file included with all distributions of the 
Covered Software under this License. Except to the extent prohibited 
by statute or regulation, such description must be sufficiently 
detailed for a recipient of ordinary skill to be able to understand it.

5. Termination

5.1. The rights granted under this License will terminate automatically 
if You fail to comply with any of its terms. However, if You become 
compliant, then the rights granted under this License from a  
particular Contributor are reinstated (a) provisionally, unless and 
until such Contributor explicitly and finally terminates Your grants, 
and (b) on an ongoing basis, if such Contributor fails to notify You 
of the non-compliance by some reasonable means prior to 60 days after 
You have come back into compliance. Moreover, Your grants from a 
particular Contributor are reinstated on an ongoing basis if such 
Contributor notifies You of the non-compliance by some reasonable 
means, this is the first time You have received notice of 
non-compliance with this License from such Contributor, and You become 
compliant prior to 30 days after Your receipt of the notice.

5.2. If You initiate litigation against any entity by asserting a 
patent infringement claim (excluding declaratory judgment actions, 
counter-claims, and cross-claims) alleging that a Contributor Version 
directly or indirectly infringes any patent, then the rights granted to 
You by any and all Contributors for the Covered Software under Section 
2.1 of this License shall terminate.

5.3. In the event of termination under Sections 5.1 or 5.2 above, all 
end user license agreements (excluding distributors and resellers)
which have been validly granted by You or Your distributors under this 
License prior to termination shall survive termination.

6. Disclaimer of Warranty

Covered Software is provided under this License on an “as is” 
basis, without warranty of any kind, either expressed, implied, or 
statutory, including, without limitation, warranties that the Covered 
Software is free of defects, merchantable, fit for a particular purpose 
or non-infringing. The entire risk as to the quality and performance of 
the Covered Software is with You. Should any Covered Software prove 
defective in any respect, You (not any Contributor) assume the cost of 
any necessary servicing, repair, or correction. This disclaimer of 
warranty constitutes an essential part of this License. No use of any 
Covered Software is authorized under this License except under this 
disclaimer.

7. Limitation of Liability

Under no circumstances and under no legal theory, whether tort 
(including negligence), contract, or otherwise, shall any Contributor, 
or anyone who distributes Covered Software as permitted above, be 
liable to You for any direct, indirect, special, incidental, or 
consequential damages of any character including, without limitation, 
damages for lost profits, loss of goodwill, work stoppage, computer 
failure or malfunction, or any and all other commercial damages or 
losses, even if such party shall have been informed of the possibility 
of such damages. This limitation of liability shall not apply to 
liability for death or personal injury resulting from such party’s 
negligence to the extent applicable law prohibits such limitation. Some 
jurisdictions do not allow the exclusion or limitation of incidental or 
consequential damages, so this exclusion and limitation may not apply 
to You.

8. Litigation

Any litigation relating to this License may be brought only in the 
courts of a jurisdiction where the defendant maintains its principal 
place of business and such litigation shall be governed by laws of that 
jurisdiction, without reference to its conflict-of-law provisions. 
Nothing in this Section shall prevent a party’s ability to bring 
cross-claims or counter-claims.

9. Miscellaneous

This License represents the complete agreement concerning the subject 
matter hereof. If any provision of this License is held to be 
unenforceable, such provision shall be reformed only to the extent  
necessary to make it enforceable. Any law or regulation which provides 
that the language of a contract shall be construed against the drafter 
shall not be used to construe this License against a Contributor.

10. Versions of the License

10.1. New Versions

Mozilla Foundation is the license steward. Except as provided in 
Section 10.3, no one other than the license steward has the right to 
modify or publish new versions of this License. Each version will be 
given a distinguishing version number.

10.2. Effect of New Versions

You may distribute the Covered Software under the terms of the version 
of the License under which You originally received the Covered 
Software, or under the terms of any subsequent version published by the 
license steward.

10.3. Modified Versions

If you create software not governed by this License, and you want to 
create a new license for such software, you may create and use a 
modified version of this License if you rename the license and remove 
any references to the name of the license steward (except to note that 
such modified license differs from this License).

10.4. Distributing Source Code Form that is Incompatible With Secondary 
Licenses

If You choose to distribute Source Code Form that is Incompatible With 
Secondary Licenses under the terms of this version of the License, the 
notice described in Exhibit B of this License must be attached.

Exhibit A - Source Code Form License Notice

This Source Code Form is subject to the terms of the Mozilla Public 
License, v. 2.0. If a copy of the MPL was not distributed with this 
file, You can obtain one at http://mozilla.org/MPL/2.0/.

If it is not possible or desirable to put the notice in a particular 
file, then You may include the notice in a location (such as a LICENSE 
file in a relevant directory) where a recipient would be likely to look 
for such a notice.

You may add additional accurate notices of copyright ownership.

Exhibit B - “Incompatible With Secondary Licenses” Notice

This Source Code Form is “Incompatible With Secondary Licenses”, as 
defined by the Mozilla Public License, v. 2.0.

MADlib builds Eigen using the EIGEN_MPL2_ONLY flag enabled.
----------------------------------------------------------------------------
std::ctype<char>::_M_widen_init() is a function authored by Jerry Quinn
<jlquinn@optonline.net>, which was added to libstdc++ with revision 74662 on
Dec 16, 2003 [1].

With permission from Jerry (thankfully received on Oct 9, 2012), we include a
copy of this function in the MADlib repository. The sole intention is to allow
compiling MADlib with recent versions of gcc while still keeping the runtime
dependencies limited to earlier versions of libstdc++. Technical details are
given in src/utils/libstdcxx-compatibility.cpp.

Revision 74662 of the libstdc++-v3 file include/bits/locale_facets.h, where
std::ctype<char>::_M_widen_init() has been copied from, also included the
following notice in the file header [2]:

// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
// Free Software Foundation, Inc.

// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING.  If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.

// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.

Links:
[1] http://gcc.gnu.org/viewcvs?diff_format=h&view=revision&revision=74662
[2] http://gcc.gnu.org/viewcvs/trunk/libstdc%2B%2B-v3/include/bits/locale_facets.h?diff_format=h&view=markup&pathrev=74662
----------------------------------------------------------------------------
argparse is (c) 2006-2009 Steven J. Bethard <steven.bethard@gmail.com>.

The argparse module was contributed to Python as of Python 2.7 and thus
was licensed under the Python license. Same license applies to all files in
the argparse package project.

For details about the Python License, please see Python_License_v2.7.1.txt.

History
-------

Before (and including) argparse 1.1, the argparse package was licensed under
Apache License v2.0.

After argparse 1.1, all project files from the argparse project were deleted
due to license compatibility issues between Apache License 2.0 and GNU GPL v2.

The project repository then had a clean start with some files taken from
Python 2.7.1, so definitely all files are under Python License now.