python类DerivedPropertyError()的实例源码

def __set__(self, *args):
    raise db.DerivedPropertyError(
        'Class-key is a derived property and cannot be set.')

def __set__(self, *args):
    raise db.DerivedPropertyError(
        'Class-key is a derived property and cannot be set.')

def __set__(self, *args):
    raise db.DerivedPropertyError(
        'Class-key is a derived property and cannot be set.')

def __set__(self, *args):
    raise db.DerivedPropertyError(
        'Class-key is a derived property and cannot be set.')

def __set__(self, *args):
    raise db.DerivedPropertyError(
        'Class-key is a derived property and cannot be set.')