首先请不要直接在您的帖子中发布代码。使用代码块按钮创建代码块。

Firstly please do not post code directly in your thread. Use the Code Block button to create a code block.

其次，发布没有任何上下文或信息的代码对我们没有帮助。请准确说明问题所在。澄清它发生在哪一行以及发生时正在使用的任何数据。

Secondly, posting code without any context or information isn't going to be helpful. Please indicate exactly what the issue is. Clarify what line it is occurring on and any data you're using when it occurs.