AttributeError: 'NoneType' object has no attribute 'Gantt'

AttributeError: 'NoneType' object has no attribute 'Gantt'是一个`AttributeError`异常，意味着在某个对象中，没有名为'Gantt'的属性。根据给出的引用内容，我没有找到对应的解决方法来解决这个具体的问题。然而，根据异常的信息，推测可能是在代码中使用了一个不存在的属性'Gantt'导致的。要解决这个问题，你可以检查代码中的对象，确保它们都有名为'Gantt'的属性，并且在使用这个属性之前对对象初始化。如果问题仍然存在，你可以检查代码中对对象的赋值和操作，以确保它们正确地引用了所需的属性。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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