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36 lines
855 B
Python
36 lines
855 B
Python
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class Subject:
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def __init__(self):
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"""list of current observers"""
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self._observables = []
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def notify(self, modifier=None, data=None):
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"""run callbacks on update"""
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for observer in self._observables:
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observer.on_update(modifier, data)
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def add(self, observer):
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"""adds an observer to observables"""
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if observer not in self._observables:
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self._observables.append(observer)
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def remove(self, observer):
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"""removes an observer from observables"""
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try:
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self._observables.remove(observer)
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except ValueError:
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pass
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def get(self) -> list:
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"""returns the current observables"""
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return self._observables
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def clear(self):
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"""clears the observables list"""
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self._observables.clear()
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