Prefer a micropython answer but will accept CPython
I'm implementing a Python function in C.
How do you apply a decorator to Python function written in C?
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You should check out the answers to this question.meat– meat2018-07-23 14:41:03 +00:00Commented Jul 23, 2018 at 14:41
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Wouldn't the function be exposed through the Python API? And then you can just apply the decorator at that level?9769953– 97699532018-07-23 14:43:16 +00:00Commented Jul 23, 2018 at 14:43
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1 Answer
Decorators can be invoked with a function as their argument. So if you would have written this (in Python):
@mydeco
def myfunc(x, y):
return x * y
You can instead write this:
def myimpl(x, y):
return x * y
myfunc = mydeco(myimpl)
You can then move myimpl to C.
If your decorator takes arguments:
myfunc = mydeco(a, b)(myimpl)
1 Comment
zwol
Suggest also demonstrating passing arguments to the decorator:
@mydeco(1,2,3) def myfunc(...) -> myfunc = mydeco(1,2,3)(myimpl). Double function call parentheses are surprising the first several times you see them, and it's not obvious from the documentation that this is how you do it.