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Zope database adapter for PostGreSQL

Project description Documentation Status Latest stable release on PyPI Stable release supported Python versions


This is a Zope database adapter for PostGreSQL based on psycopg2 for Zope 4 and up on all Python versions supported by Zope 4 and 5.

The code was forked from the original project at because it appears to be dead. The old code is not compatible with Zope 4/5 and Python 3.


  • Federico Di Georgio: Original Author

  • Daniele Varrazzo: Separate ZPsycopgDA project

  • Rijk Stofberg: Eggifying

  • Jens Vagelpohl: Compatibility with Zope 4 and up; drop Zope 2 and Zope 3


4.2 (2023-12-07)

  • Add support for Python 3.12.

  • Ensure connection always get properly initialized.

  • Add support for PostgreSQL 13.

4.1 (2023-10-04)

  • Add support for reading the connection string from an environment variable. Use ENV:DB_CONN as connection string to look up the actual connection string in the environment variable DB_CONN.

4.0 (2023-02-02)

  • Drop support for Python 2.7, 3.5, 3.6.

3.1 (2023-01-16)

  • Update to latest meta/config

3.0 (2023-01-05)

  • Add support for Python 3.11

3.0b1 (2022-08-31)

  • Re-released under the Zope Public License (ZPL) version 2.1

  • Updated package layout and name to conform to current Zope standards

  • Added compatibility with Zope 4 and Zope 5

  • Removed compatibility with Zope 2 and Zope 3

  • Added unit and functional tests


  • Removed ZPsycopgDA dependencies on deprecated (Python or Zope) features.


  • Added all the supported isolation level options

  • Fixed pool bugs (psycopg issues #123, #125, #142)


  • Make this and egg.

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