‘kwargs’ is empty in python decorator

I run a decorator demo below.

def logger(func):
    def inner(*args, **kwargs):
        print(args)
        print(kwargs)
        return func(*args, **kwargs)
    return inner

@logger
def foo1(a, b, c, x=2, y=1):
    print(x * y)

foo1(6,7,8)

output is:

(6, 7, 8)
{}
2

Why is the dict empty? I think it should be {'x':2, 'y':1}

from ‘kwargs’ is empty in python decorator