On 11/13/2015 05:14 PM, Chris Angelico wrote:
> On Sat, Nov 14, 2015 at 10:04 AM, fl <rxjw...@gmail.com> wrote:
>> I read the following code snippet. A question is here about '@'.
>> I don't find the answer online yet.
>>
>> What function is it here?
>>
>>
>> @pymc.deterministic
>> def theta(a=alpha, b=beta):
>> """theta = logit^{-1}(a+b)"""
>> return pymc.invlogit(a+b*x)
>
> That's called a "function decorator". And now that you know the name,
> you'll be able to find what it is online; as well as the Python docs,
> there are a number of blog posts and other articles about it.
>
> ChrisA
>
One small point of order ... if you want to be precise, "@pymc.deterministic"
is a *function decoration*. The "decorator" is the function
pymc.deterministic().
I know this is a fussy point, but this distinction is helpful when first
learning the concept.
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