【Python】去除Warning：You provided Unicode markup but also provided a value for from_encoding. Your from_encoding will be ignored.

今天执行一爬虫脚本时出现以下Warning：

C:\hy\py>python myblogSummary.py
C:\Users\ufo\AppData\Local\Programs\Python\Python37\lib\site-packages\bs4\__init__.py:223: UserWarning: You provided Unicode markup but also provided a value for from_encoding. Your from_encoding will be ignored.
  warnings.warn("You provided Unicode markup but also provided a value for from_encoding. Your from_encoding will be ignored.")

出现以上告警原因是因为有了这一句：

soup= BeautifulSoup(html.text,'html.parser'，from_encoding="utf-8");

 

解决方案：

将上一句修改成：

soup= BeautifulSoup(html.text,'html.parser');

 

原因：

python3 缺省的编码是unicode, 再在from_encoding设置为utf8就重复了, 会被忽视掉，故而运行程序出现告警（当然不理这个告警也可以）。

 

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