關於python:ocal variable ‘xxx’ referenced before assignment的錯誤解決

代碼舉例如下： 在函數外面定義了一個變量 xxx ，然後在函數裏面引用這個變量，並改變它的值，編譯器提示： Unresolved reference ‘xxx’ This inspection detects names that should resolve but don’t. Due to dynamic dispatch and duck typing, this is possible

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