class Person(object):

    def __init__(self,name,gender,birth,**kw):

        self.name = name

        self.gender = gender

        self.birth = birth

        self.__dict__.update(kw)##这一句是啥意思啊？

xiaoming = Person('Xiao Ming', 'Male', '1990-1-1', job='Student')

print xiaoming.name

print xiaoming.job