用这种方法遍历dict为什么不行？

Question

class Person(object):    def __init__(self,name,gender,birth,**kw):        self.name=name        self.gender=gender        self.birth=birth        for key in kw:            self.key=kw[key]xiaoming = Person('Xiao Ming', 'Male', '1990-1-1', job='Student')print xiaoming.nameprint xiaoming.job