作业

class Student(object):
def __init__(self, name, gender):
    self.name = name
    self.__gender = gender
def set_gender(self, gender):
    self.__gender = gender

def get_gender(self):
    return    self.__gender

bart1 = Student('Bart', 'male')
print(bart1._Student__gender)
if hasattr(bart1,"_Student__gender"):
    print("have  bart1._Student__gender=" ,bart1._Student__gender)
else:
    print("no __gender")