相关疑难解决方法(0)

有没有办法在Python中创建类级别的只读属性？例如,如果我有课Foo,我想说:

x = Foo.CLASS_PROPERTY

但是阻止任何人说:

Foo.CLASS_PROPERTY = y

编辑: 我喜欢Alex Martelli解决方案的简单性,但不喜欢它需要的语法.他和~ututbu的答案都启发了以下解决方案,这更接近我所寻找的精神:

class const_value (object):
    def __init__(self, value):
        self.__value = value

    def make_property(self):
        return property(lambda cls: self.__value)

class ROType(type):
    def __new__(mcl,classname,bases,classdict):
        class UniqeROType (mcl):
            pass

        for attr, value in classdict.items():
            if isinstance(value, const_value):
                setattr(UniqeROType, attr, value.make_property())
                classdict[attr] = value.make_property()

        return type.__new__(UniqeROType,classname,bases,classdict)

class Foo(object):
    __metaclass__=ROType
    BAR = const_value(1)
    BAZ = 2

class Bit(object):
    __metaclass__=ROType
    BOO = const_value(3)
    BAN = 4

现在,我得到:

Foo.BAR …