python - class propert应用

            #
            方式一:
            
#
             class Student(object):
            
#
                 def __init__(self,name,sc):
            
#
                     self.name = name
            
#
                     self.sc = sc
            
#
#
                 @property
            
#
                 def score(self):
            
#
                     return self.sc
            
#
#
                 @score.setter
            
#
                 def score(self,value):
            
#
                     if not isinstance(value, int):
            
#
                         raise ValueError(‘分数必须是整数才行呐‘)
            
#
                     if value < 0 or value > 100:
            
#
                         raise ValueError(‘分数必须0-100之间‘)
            
#
                     self.sc = value
            
#
#
                 @score.deleter
            
#
                 def score(self):
            
#
                     del self.sc
            #
            -----------------------------------------------------------
            #
            方式二:
            class
             Student(object):
    
            def
            __init__
            (self,name,sc):
        self.name = name
        self.sc = sc

    def get_score(self):
        return self.sc

    def set_score(self,value):
        ifnot isinstance(value, int):
            raise ValueError(‘分数必须是整数才行呐‘)
        if value < 0 or value > 100:
            raise ValueError(‘分数必须0-100之间‘)
        self.sc = value

    def del_score(self):
        del self.sc

    score = property(get_score,set_score,del_score)

X = Student(‘anec‘,50)
print(X.__dict__)
print(X.score)
X.score = 90
print(X.score)
del X.score
print(X.__dict__)