利用python编写的文本预处理的程序，包含了每一步的实现代码，分为删除标点符号、删除停用词、相似度计算、PCA降维、聚类以及可视化等，运行环境为pytharm，python3开发环境(The text preprocessing program written by Python contains every step of implementation code, which is divided into delete punctuation marks, delete stop word

实现比较文本的差异，和得到两个文本的最大相似度(Implementing the comparison text and getting the maximum similarity)

对文本的情感分析的划分和测试，相似度进行判断(The classification and test of text sentiment analysis, and the judgement of similarity.)