title: Couldn't find a tree builder with the features you requested: html5lib. Do you need to install a parser library?
body: <p>I try to use soup4 with my python3.5 ,but evrey time i rule a code to extrac something from internet i get this error :</p>
  
  <pre><code> - s4\__init__.py", line 198, in __init__
         % ",".join(features)) bs4.FeatureNotFound: Couldn't find a tree builder with the features you requested: html5lib. Do you need to    install a parser library?
  </code></pre>
  
  <p>There was a link with the same error in this site <a href="https://stackoverflow.com/questions/24398302/bs4-featurenotfound-couldnt-find-a-tree-builder-with-the-features-you-requeste">bs4.FeatureNotFound: Couldn&#39;t find a tree builder with the features you requested: lxml. Do you need to install a parser library?</a>
  I tried all , still get the error </p>
  
  <p>All the pip install requests 
  pip install lxml
  pip install beautifull soup4 </p>
  
  <p>I download soup4 <a href="https://www.crummy.com/software/BeautifulSoup/bs4/download/4.6/" rel="noreferrer">https://www.crummy.com/software/BeautifulSoup/bs4/download/4.6/</a> manual an install it   setup.py install </p>
  
  <p>I have all updated and working , but still i get the error plz help me</p>