title: Can not import libxml2 and libxslt in Python 2.7 and CentOS 7
body: <p><strong>Can not import <code>libxml2</code> and <code>libxslt</code> in <code>Python 2.7</code> and <code>CentOS 7</code>.</strong></p>
  
  <p>But system says that these packages are installed:</p>
  
  <pre><code>Package libxml2-2.9.1-5.el7_1.2.x86_64 already installed and latest version
  Package libxml2-devel-2.9.1-5.el7_1.2.x86_64 already installed and latest version
  Package libxslt-1.1.28-5.el7.x86_64 already installed and latest version
  Package libxslt-devel-1.1.28-5.el7.x86_64 already installed and latest version
  </code></pre>
  
  <p>But can not import in Python2.7</p>
  
  <pre><code>Python 2.7.5 (default, Jun 24 2015, 00:41:19) 
  [GCC 4.8.3 20140911 (Red Hat 4.8.3-9)] on linux2
  Type "help", "copyright", "credits" or "license" for more information.
  &gt;&gt;&gt; import libxml2
  Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  ImportError: No module named libxml2
  &gt;&gt;&gt; import libxslt
  Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  ImportError: No module named libxslt
  &gt;&gt;&gt; 
  </code></pre>