说明：  该程序是用python编写的，功能是识别手写阿拉伯数字，首先用户需要手写一些阿拉伯数字图片作为识别的标准，之后该程序会将你要识别的手写阿拉伯数字与你先前构造的数据标准集进行比对，测试出它是数字几。
(The program is written in python. Its function is to recognize handwritten Arabic numerals. First, users need to write some pictures of Arabic numerals as recognition criteria. Then, the program will compare the handwritten Arabic numerals you want to recognize with the data standard set you constructed previously, and test how many numerals it is.)