來源：zhuanlan.zhihu.com/p/35755039作者：Artrix項目：github.com/ArtrixTech/BoomMine人生苦短，快

1. 引言在程序設計中，對於字符串的處理是個免不了的工作。對於字符串的常見操作，Python內置了各種不同的工具，本篇要討論的是關於Python中字串格式化輸出

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思路判斷參數是否合法：至少需要兩個參數（判斷長度是否大於2）只接受正整數（遍歷所有參數》判斷類型是否為整型 是否小於等於零）不符合：返回提示信息 <字符串

前言：面向對象的設計方法裡面，最重要的兩條，一條是代碼復用，通過繼承的權限設置進行封裝。 Python的類封裝和C++的定義類似，只是不用關鍵字。但是他的類型的