The observer pattern is a software design pattern in which an object, called the subject, maintains a list of its dependents, called observers, and notifies them automatically of any state changes, usually by calling one of their methods .
The observer.py implementation has a topic-based system, a message filtering type of the publish–subscribe pattern (an observer pattern variation) . Therefore, a subject can be subdivided into topics and observers can express interest in one (or more) topic and only receive notifications (with any message or not) from that.
The implementation is also based on the jquery publish–subscribe model  . So, for convenience, observers will be called handlers and topics will be called events. The observer module has only two members: Event and Observable. An Observable instance allows you connect different handlers to its events. A handler can be any function, method or callable object.
A simpler implementation of the pattern can be found at old.py.
TODO: Figure out how to actually get changelog content.
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|File Name & Checksum SHA256 Checksum Help||Version||File Type||Upload Date|
|pattern_observer-1.0.0-py3-none-any.whl (8.3 kB) Copy SHA256 Checksum SHA256||py3||Wheel||Jan 14, 2016|
|pattern-observer-1.0.0.tar.gz (6.1 kB) Copy SHA256 Checksum SHA256||–||Source||Jan 14, 2016|