def p_varargslist3(p):
    # def f(a, **kwargs): pass
    # def f((a, b), **kwargs): pass
    p[0] = ast.arguments(args=[p[1]], defaults=[], vararg=None, kwarg=p[4])
varargslist : fpdef COMMA DOUBLESTAR NAME
dataset/ETHPy150Open nucleic/enaml/enaml/core/parser.py/p_varargslist3