python中property(lambda self: object())簡單解釋

最后4行lambda。問題是：如何運作？它們的含義和結果是什么？您能否以簡單的方式顯示該聲明的示例？現在謝謝！

class error(Exception):
    """ Base class for I/O related errors. """
    def __init__(self, *args, **kwargs): # real signature unknown
        pass

    @staticmethod # known case of __new__
    def __new__(S, *more): # real signature unknown; restored from __doc__
        """ T.__new__(S, ...) -> a new object with type S, a subtype of T """
        pass

    def __reduce__(self, *args, **kwargs): # real signature unknown
        pass

    def __str__(self): # real signature unknown; restored from __doc__
        """ x.__str__() <==> str(x) """
        pass

    characters_written = property(lambda self: object()) # default
    errno = property(lambda self: object()) # default
    filename = property(lambda self: object()) # default
    strerror = property(lambda self: object()) # default

1個

property是內置的。通常用作裝飾器。該代碼與此等效，可能看起來更加熟悉：

class error(Exception):
    #...
    @property
    def characters_written(self):
        return object()

    @property
    def errno(self):
        return object()

    @property
    def filename(self):
        return object()

    @property
    def strerror(self):
        return object()