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psycopg is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version. See file COPYING for details.
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As a special exception, specific permission is granted for the GPLed
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code in this distribition to be linked to OpenSSL and PostgreSQL libpq
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without invoking GPL clause 2(b).
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Note that the GPL was chosen to avoid proprietary adapters based on
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psycopg code. Using psycopg in a proprietary product (even bundling
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psycopg with the proprietary product) is fine as long as:
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1. psycopg is called from Python only using only the provided API
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(i.e., no linking with C code and no C modules based on it); and
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2. all the other points of the GPL are respected (you offer a copy
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of psycopg's source code, and so on.)
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If you prefer you can use the Zope Database Adapter ZPsycopgDA (i.e.,
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every file inside the ZPsycopgDA directory) user the ZPL license as
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published on the Zope web site, http://www.zope.org/Resources/ZPL.
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Also, the following BSD-like license applies (at your option) to the
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files following the pattern psycopg/adapter*.{h,c} and
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psycopg/microprotocol*.{h,c}:
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this
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software in a product, an acknowledgment in the product documentation
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would be appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not
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be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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psycopg is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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A non-exclusive license is available for companies that want to include
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psycopg in their proprietary products without respecting the spirit of the
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GPL. The price of the license is one day of development done by the author,
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at the consulting fee he applies to his usual customers at the day of the
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