blinker

Blinker provides a fast dispatching system that allows any number of interested parties to subscribe to events, or “signals”.

Signal receivers can subscribe to specific senders or receive signals sent by any sender.

>>> from blinker import signal
>>> started = signal('round-started')
>>> def each(round):
...     print "Round %s!" % round
...
>>> started.connect(each)

>>> def round_two(round):
...     print "This is round two."
...
>>> started.connect(round_two, sender=2)

>>> for round in range(1, 4):
...     started.send(round)
...
Round 1!
Round 2!
This is round two.
Round 3!

Requirements

Blinker requires Python 2.4 or higher, Python 3.0 or higher, or Jython 2.5 or higher.

Changelog Summary

1.2 (October 26, 2011)

Added Signal.receiver_connected and Signal.receiver_disconnected per-Signal signals.
Deprecated the global ‘receiver_connected’ signal.
Verified Python 3.2 support (no changes needed!)

1.1 (July 21, 2010)

Added @signal.connect_via(sender) decorator
Added signal.connected_to shorthand name for the temporarily_connected_to context manager.

1.0 (March 28, 2010)

Python 3.x compatibility

0.9 (February 26, 2010)

Sphinx docs, project website
Added with a_signal.temporarily_connected_to(receiver): ... support

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Uploaded Oct 27, 2011 Source

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