ankit-g / psycopg2-pgevents

PostGreSQL LISTEN/NOTIFY functionality, via psycopg2.

psycopg2-pgevents

This package makes it simple to use PostGreSQL's NOTIFY/LISTEN eventing system from Python in a consistent, pleasing manner.

Note that this project officially supports Python 3.6+. This is primarily due to static typing.

Example

The following shows an example of the package in action.

Assumptions

• PostGreSQL server is running locally.
• DB "eventtriggertest" is available

Troubleshooting

• The connection's autocommit property must be enabled for this package to operate correctly. This requirement is provided by PostGreSQL's NOTIFY/LISTEN mechanism.
• The same connection that is used with register_event_channel() must be used with poll() in order to receive events. This is due to the nature of how PostGreSQL manages "listening" connections.
• If the table that you'd like to listen to is not in the public schema, the schema name must be given as a keyword argument in the install_trigger() method.

Authorship and License

Orignally Written by Shawn Wallis and distributed under the MIT license.