爬虫问题解决--UserWarning:BeautifulSoup(YOUR_MARKUP, "lxml")--Binrry(冰蕊)

Binrry

于 2018-12-03 16:01:40 发布

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本文链接：https://blog.youkuaiyun.com/qq_40859852/article/details/84769645

版权

本文介绍了在使用BeautifulSoup进行网络数据采集时遇到的UserWarning问题，详细解析了问题的原因及如何修复。通过指定解析器为'lxml'，可以避免因系统或环境差异导致的不同行为。

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问题：

UserWarning: No parser was explicitly specified, so I’m using the best
available HTML parser for this system (“lxml”). This usually isn’t a
problem, but if you run this code on another system, or in a different
virtual environment, it may use a different parser and behave
differently.

The code that caused this warning is on line 193 of the file
…runpy.py. To get rid of this warning, change code that looks
like this:

BeautifulSoup(YOUR_MARKUP})

to this:

BeautifulSoup(YOUR_MARKUP, “lxml”)

markup_type=markup_type))

原代码：

from urllib.request import urlopen
from bs4 import BeautifulSoup
html=urlopen("http://pythonscraping.com/pages/page1.html")
bsObj=BeautifulSoup(html.read())
print(bsObj.h1)