AttributeError: 'NoneType' object has no attribute 'landmark

回答: AttributeError: 'NoneType' object has no attribute 'landmark'错误是在我们尝试访问None值的属性时发生的。在这种情况下，错误提示中提到的'landmark'是一个属性，但是它不存在于NoneType对象中。要解决此错误，我们需要检查代码中是否存在错误的分配或赋值。请确保在访问属性之前正确地分配或赋值。<em>1</em><em>2</em><em>3</em>
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