如果之前已经设置了属性，如何防止再次设置属性？

private int myProperty;

public int getMyProperty() {
    return myProperty;
}

public void setMyProperty(int value) {
    if (myProperty == 0) {
        myProperty = value;
    }
}

class MyClass:
    def __init__(self):
        self._my_property = None
        self._is_property_set = False

    @property
    def my_property(self):
        return self._my_property

    @my_property.setter
    def my_property(self, value):
        if not self._is_property_set:
            self._my_property = value
            self._is_property_set = True