[root@localhost beautifulsoup]# python lianxi.py
/usr/lib/python2.7/site-packages/bs4/__init__.py:181: 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 36 of the file lianxi.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))

=============================================
源代码：

def handle_html():
# with open('index.txt', 'r') as e:
# html_doc = ''.join(e.readlines())

soup = BeautifulSoup(html_doc)
# print soup.prettify()
print soup.title.name
print soup.find_all('a')

解决办法：
修改为soup = BeautifulSoup(html_doc,'html_parser')

def handle_html():
# with open('index.txt', 'r') as e:
# html_doc = ''.join(e.readlines())

soup = BeautifulSoup(html_doc,'html_parser')
# print soup.prettify()
print soup.title.name
print soup.find_all('a')

ITPub博客

beautifulsoup 运行报错“UserWarning: No parser was explicitly specified,...."

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