[nhtua]

I made these changes to implement for:
#246
#399
#555

It's more than 4 years from the date when people found it hard to apply to Invoke @task on other @decorator. The root cause of it is inspect.getargspec which couldn't handle decorated function. It's also recommended replacing by inspect.signature for a "more structured introspection API for callables" from python 3.4.

I also keep the compatibility with Python 2.x by using the original function under the name argspec_python2. New argspec will check if it is Python 2 and switch the flow to argspec_python2 on runtime.

[nhtua]

Don't know if we should drop support for Python 2.7 now. It's up to you bitprophet.
I've updated my PR to be compatible backward to Python 2.7
But I intend to support @task applying on top of others decorator only on Python 3 because Python 2.x does not have inspect.signature.

[nhtua]

I will update some test-cases to ensure argspec() will work well with multi decorators.

[nhtua]

I've added unit test to cover cases of applying multi decorators (both function and class decorators).

[nhtua]

Sorry, Just accidentally clicked the button Request Review. I cancelled the request. Don't want to be rude to ask you review it now. Take your time. Thank you!

[lyrixx]

Hello @bitprophet, did you see this PR ? I would be fantastic to have support for decorator 😍

[phelian]

Another voice for getting this in @bitprophet

[hjoukl]

I'd also like to see this go in :-).

FWIW if Python 2.7 compatibility is of prime concern here one could still fall back to use inspect.getargspec(f.__wrapped__) for the Python 2.7 case (as you probably know). Provided you can use a modified/enhanced alternative to functools.wraps for the decoration, as Py2-functools.wraps does not set this convenient attribute.

Some helpful discussion (imho) can be found here: https://stackoverflow.com/a/43506509/7379507

[neozenith]

Looks like this overlaps with some other issues reported about type checking in #606 and #458
I'll have a look at reviewing this area of the code over coming weeks especially if we can get a 2-for-1

[bitprophet]

2.0.0 will be out soon & is now using inspect.signature!