def p_varargslist13(p):
    # def f(a=1, **kwargs): pass
    # def f((a,b)=(1,2), **kwargs): pass
    p[0] = ast.arguments(args=[p[1]], defaults=[p[3]], vararg=None, kwarg=p[6])
varargslist : fpdef EQUAL test COMMA DOUBLESTAR NAME
dataset/ETHPy150Open nucleic/enaml/enaml/core/parser.py/p_varargslist13