comments.py即为源代码，直接python运行即可。开始运行需要输入两个参数：商品id和评论页数，之后程序自动爬取， 内容保存在jd_comment.txt文件。
ciyun_jichu.py则是将爬取的评论通过词云展现出来，用的jieba中文分词，效果如下：
ciyun_textrank-extract_tags.py则思通过textrank/extract_tags两种方式提取关键词后，再用词云展现出来。
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