python in class decorator with parameter

gistfile1.py

class Baaar:
    def __init__(self):
        self.z = 10

    def wrapper(v:int = 0):
        def f2(f):
            def f2_v(self, *args, **kwargs):
                print('z=%d' % self.z)
                return f(self, *args, **kwargs) + v
            return f2_v
        return f2


    @wrapper(4)
    def foo(self, x:int):
        return 3+x

    @wrapper(4)
    def foo1(self, x:int):
        return 3+x+self.z

    @wrapper(4)
    def foo2(self, x:int, y: int):
        return 3+x*y + self.z

a = Baaar()
print(a.foo(1))
print(a.foo1(1))
print(a.foo2(1,6))