在flask中定義了一個簡單的刪除數據庫內容的路由
測試卻發現一直報錯
說delete_history函數定義時沒有接受參數，但是檢查delete_history函數卻發現沒有問題
后來想了半天才發現delete_history的路由函數名也是delete_history，那么程序就會調用路由函數而不會調用import進來的delete_history函數，從而導致這個問題
將路由函數重命名，測試成功。
千萬不要寫和路由函數同名的自定義函數啊！
免責聲明！
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