python-blinker: python-blinker (object-to-object and broadcast signaling for Python)
python-blinker: 
python-blinker: Blinker provides fast & simple object-to-object and broadcast 
python-blinker: signaling for Python objects.
python-blinker: The core of Blinker is quite small but provides powerful features:
python-blinker:   -a global registry of named signals and anonymous signals
python-blinker:   -custom name registries
python-blinker:   -permanently or temporarily connected receivers
python-blinker:   -automatically disconnected receivers via weak referencing sending
python-blinker:    arbitrary data payloads
python-blinker:   -collecting return values from signal receivers