Module status :: Class Observer
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Class Observer

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The observer design pattern base class.

Instance Methods [hide private]
 
__init__(self, name='unknown')
Set up the object.
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notify(self)
Notify all observers of the state change.
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register(self, key, method, method_name=None)
Register a method to be called when the state changes.
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reset(self)
Reset the object.
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unregister(self, key)
Unregister the method corresponding to the key.
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Inherited from object: __delattr__, __format__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __repr__, __setattr__, __sizeof__, __str__, __subclasshook__

Properties [hide private]

Inherited from object: __class__

Method Details [hide private]

__init__(self, name='unknown')
(Constructor)

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Set up the object.

Parameters:
  • name (str) - The special name for the observer object, used in debugging.
Overrides: object.__init__

register(self, key, method, method_name=None)

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Register a method to be called when the state changes.

Parameters:
  • key (str) - The key to identify the observer's method.
  • method (method) - The observer's method to be called after a state change.
  • method_name (str or None) - The optional method name used in debugging printouts.

unregister(self, key)

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Unregister the method corresponding to the key.

Parameters:
  • key (str) - The key to identify the observer's method.