gossip is a library implementing a basic hook mechanism for implementing callbacks. It provides flexible configuration, hook namespaces and error handling strategies.

$ pip install gossip

The simplest use case when we want to register a callback to be called later. We start by registering a callback through gossip.register:

>>> from __future__ import print_function
>>> import gossip
>>> @gossip.register('hook_name')
... def func():
...     print('Called')

Now we can call the hook:

>>> gossip.trigger('hook_name')
Called

Plain publish/subscribe is just the tip of the iceberg. Gossip is geared towards implementing complex plugin systems, and supports many more advanced features, such as:

1. Token (bulk) unregistration of hooks
2. Hook dependencies - control the order of hook callbacks, either implicitly or explicitly
3. Non-reentrant hooks
4. Custom exception handling strategies

And much more. For more information, please refer to the documentation

BSD3