Using cython with argh failed: AttributeError: 'builtin_function_or_method' object has no attribute 'argh_args'

[speq]

Hi all,
I'm with following code:

import argh

@argh.expects_obj
@argh.arg('-output', default='', help='')
def mainx(args):
    pass

if __name__ == "__main__":
    argh.dispatch_command(mainx)

and build with cython

cython --embed mainx.pyx
gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -I. -I /tools/el7.x86_64/python3/3.8/include/python3.8 mainx.c /tools/el7.x86_64/python3/3.8/lib/libpython3.8.so -o mainx

exception:

Traceback (most recent call last):
  File "xx.pyx", line 6, in init xx
  File "/tools/el7.x86_64/python/3.8/lib/python3.8/site-packages/argh/decorators.py", line 130, in wrapper
    setattr(func, ATTR_ARGS, declared_args)
AttributeError: 'builtin_function_or_method' object has no attribute 'argh_args'