blinker-alt 1.5

Fast, simple object-to-object and broadcast signaling

[](https://pypi.python.org/pypi/blinker-alt) [](https://pypi.python.org/pypi/blinker-alt) [](https://pypi.python.org/pypi/blinker-alt)

Note: This is a fork of [jek/blinker](https://github.com/jek/blinker)!

There didn’t seem to be any activity anymore on the original repo, and the latest changes on master weren’t officially released. So I forked the repo, merged a couple of important pull requests, and released a new version to PyPI under the name [blinker-alt](https://pypi.python.org/pypi/blinker-alt).

# 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!

See the [Blinker documentation](https://pythonhosted.org/blinker/) for more information.

## Requirements

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

## Changelog Summary

1.5 (October 15, 2017)

• Lower baseline cost of no-op signal send() & optional -O speedup.

• Verified Python 3.6 support (no changes needed).

• Verified Python 3.5 support (no changes needed).

1.4 (July 23, 2015)

• Verified Python 3.4 support (no changes needed)

• Additional bookkeeping cleanup for non-ANY connections at disconnect time.

• Added Signal._cleanup_bookeeping() to prune stale bookkeeping on demand

1.3 (July 3, 2013)

• The global signal stash behind blinker.signal() is now backed by a regular name-to-Signal dictionary. Previously, weak references were held in the mapping and ephemeral usage in code like signal('foo').connect(...) could have surprising program behavior depending on import order of modules.

• blinker.Namespace is now built on a regular dict. Use blinker.WeakNamespace for the older, weak-referencing behavior.

• Signal.connect(‘text-sender’) uses an alternate hashing strategy to avoid sharp edges in text identity.

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