title: How to get rid of BeautifulSoup user warning?
body: <p>After I installed BeautifulSoup, Whenever I run my Python in cmd, this warning comes out.</p>
  
  <pre><code>D:\Application\python\lib\site-packages\beautifulsoup4-4.4.1-py3.4.egg\bs4\__init__.py:166:
  UserWarning: No parser was explicitly specified, so I'm using the best
  available HTML parser for this system ("html.parser"). 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.
  
  To get rid of this warning, change this:
  
   BeautifulSoup([your markup])
  
  to this:
  
   BeautifulSoup([your markup], "html.parser")
  </code></pre>
  
  <p>I have no ideal why it comes out and how to solve it.</p>