数独是一项快乐的益智游戏，起源于18世纪瑞士的一种数学游戏。解答者需要运用纸、笔进行演算，需要根据9×9盘面上的已知数字，推理出所有剩余空格的数字，并满足每一行、每一列、每一个粗线宫（3*3）内的数字均含1-9，不重复。
本次分享讲展示如何利用Django来直观方便地破解数独。
首先新建两个模板来展示页面，一个是index.html，方便用户输入数独，此数独可以来自其他网站；一个是answer.html，用于展示用户输入的数独的答案。
index.html的代码如下：
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