Blinker provides fast & simple object-to-object and broadcast signaling
 for Python objects. Interested signal receivers can subscribe to specific
 senders or receive signals sent by any sender.
 .
 The core of Blinker is quite small but provides powerful features:
  * a global registry of named signals
  * anonymous signals
  * custom name registries
  * permanently or temporarily connected receivers
  * automatically disconnected receivers via weak referencing
  * sending arbitrary data payloads
  * collecting return values from signal receivers
  * thread safety
 .
 This package contains the Python 3 version.