When one needs a custom property, the easy, readable, and that already
works way to create then
is just to create an instance of the their class and assign the instance to
the desired
class attribute. All the class have to do is to have the methods that
identify it as a descriptor: "__get__" and "__set__" for
data descriptors , and optionally "__del__".
The class can be made in a way to make it easier to write the setters and
getter , and have
their "__set__" and "__get__" call these other methods, but that is about
it.
```
class ThresholdProperty:
def __init__(self, threshold=0.5):
self.threshold = threshold
def __set_name__(self, owner, name):
self.name = name
def __set__(self, instance, value):
self.instance.setattr("_" + self.name, value)
def __get__(self, instance, owner):
if instance is None: return self
return int(getattr(instance, "_" + self.name) > self.threshold)
class Neuron:
activation = ThresholdProperty()
```
On Tue, 4 Aug 2020 at 05:16, Chris Angelico <[email protected]> wrote:
> On Tue, Aug 4, 2020 at 6:09 PM <[email protected]> wrote:
> >
> > Hi all,
> >
> > Seems like this topic was previously raised, but what if we add
> possibility to decorate non function properties in class:
> >
> > ```python
> > class Neuron:
> > @linear_activation
> > activation
> > ```
>
> What would that decoration do, exactly?
>
> ChrisA
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