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music-spider's Introduction

【①】
引入库:		1、os :用于当文件目录不存在时,递归创建目录树
		2、requests :发送请求
		3、lxml :利用etree解析HTML
		4、random :用于随机选取代理作为请求头,避免用一个id频繁访问
		5、json :利用解码json格式获取所需的值
		

【②】
结构:		spider_main.py :
			1\获取输入的keyword,然后组合成root_url传入 html_parser。
			2\创建文件路径
		↓
		html_parser.py :
			1\通过发送请求,解析获得文本,然后解码json格式,获取歌名、歌手、以及mid的值
		↓
		mus_output :
			1\通过X-Requested-With的异步请求头和构造一个data,发送post请求
			2\通过解码json获取url,最终写入文件

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