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48 lines
973 B
48 lines
973 B
5 years ago
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class TestThis(object):
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'''Demonstrates how to use property() as a decorator
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The power of this will be in declaring essentially private variables
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Property has built in property.setter, property.getter, property.deleter'''
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def __init__(self):
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self.voltage = 0
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@property
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def voltage(self):
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return self._voltage
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@voltage.setter
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def voltage(self, value):
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'''Variables inherit name of function, clearly. Can place tests on things here, if desired'''
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if value < 0:
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print('Voltage can not be negative')
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self._voltage=0
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else:
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self._voltage = value
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@voltage.deleter
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def voltage(self):
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print('Deleting voltage')
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del self._voltage
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@property
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def higher(self):
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self._higher = self.voltage*3
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return self._higher
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@higher.deleter
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def higher(self):
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print('deleted higher')
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del self._higher
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if __name__=='__main__':
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x = TestThis()
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x.voltage = -217
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print(x.voltage)
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print(x.higher)
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x.voltage = 3
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print(x.higher)
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del x.higher
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