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POConfusion about __get__ and __call__ in python
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9905720
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0
AnswerCount
5
ClosedDate
2018-02-03T20:33:33.627
CommentCount
4
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CreationDate
2012-03-28T10:34:43.843
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10
LastActivityDate
2012-08-08T15:44:40.243
LastEditDate
2012-03-28T11:08:47.540
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13767
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1218361
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0
PostTypeId
1
Score
10
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1164
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text
Body
<p>See the simple example below:</p> <pre><code>class Celsius(object): def __init__(self, value=0.0): self.value = float(value) def __get__(self, instance, owner): return self.value def __set__(self, instance, value): self.value = float(value) def __call__(self): print('__call__ called') class Temperature(object): celsius = Celsius() def __init__(self): self.celsius1 = Celsius() T = Temperature() print('T.celsius:', T.celsius) print('T.celsius1:', T.celsius1) output T.celsius: 0.0 T.celsius1: <__main__.Celsius object at 0x023544F0> </code></pre> <p>I wonder why they have different output. I know <code>T.celsius</code> will call the <code>__get__</code> and <code>T.celsius1</code> call the <code>__call__</code>.</p>
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Confusion about __get__ and __call__ in python
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