Python私有变量

# 访问限制的保护，代码更加健壮
class Student(object):
def __init__(self,name,score):
self.__name= name
self.__score = score

def print_scrore(self):
print("%s:%s" % (self.__name,self.__score))

def get_name(self):
return self.__name

def get_score(self):
return self.__score

def set_score(self):
if 0<=score<=100:
self.__score=score
else:
raise ValueError('bad score')

bart = Student('frank',100)
print(bart.get_name())
print(bart.get_score())