import warnings
 
def warning_property(message, warning_type=DeprecationWarning):
    class _property(property):
        def __get__(self, obj, obj_type=None):
            value = super().__get__(obj, obj_type)
            class _proxy(type(value)):
                def __call__(self):
                    warnings.warn(message, warning_type)
                    return value
            return _proxy(value)
    return _property
 
class A:
    @warning_property(".length function is deprecated. Use the .length property")
    def length(self):
        return 1
 
print(A().length)
print(A().length())# your code goes here

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