title: Is this python36 version issue? How to resolve it?
body: <p>I am on RHEL. I Installed python by following <a href="https://www.rosehosting.com/blog/how-to-install-python-3-6-4-on-centos-7/" rel="nofollow noreferrer">https://www.rosehosting.com/blog/how-to-install-python-3-6-4-on-centos-7/</a>. I am getting an error when trying to install requests-kerberos</p>
  
  <pre><code>pip3 install requests-kerberos
  </code></pre>
  
  <p>returns</p>
  
  <pre><code>src/kerberos.c:17:20: fatal error: Python.h: No such file or directory
   #include &lt;Python.h&gt;
                      ^
  compilation terminated.
  error: command 'gcc' failed with exit status 1
  </code></pre>
  
  <p>sudo yum install gcc </p>
  
  <pre><code>Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-manager 
  Package gcc-4.8.5-39.el7.x86_64 already installed and latest version 
  Nothing to do
  </code></pre>
  
  <p>Then I tried</p>
  
  <pre><code>sudo yum install python3-devel
  </code></pre>
  
  <p>and got  </p>
  
  <pre><code>  Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-manager
  No package python3-devel available.
  Error: Nothing to do
  </code></pre>
  
  <p>Then I tried</p>
  
  <pre><code>sudo yum install python36-devel
  </code></pre>
  
  <p>and got</p>
  
  <pre><code>    Error: Package: python36-devel-3.6.8-2.el7.ius.x86_64 (ius)
             Requires: python36 = 3.6.8-2.el7.ius
             Installed: python3-3.6.8-10.el7.x86_64 (@rhel-7-server-rpms)
                 python36 = 3.6.8-10.el7
             Available: python36-3.6.8-2.el7.ius.x86_64 (ius)
                 python36 = 3.6.8-2.el7.ius
  Error: Package: python36-devel-3.6.8-2.el7.ius.x86_64 (ius)
             Requires: python36-libs(x86-64) = 3.6.8-2.el7.ius
             Installed: python3-libs-3.6.8-10.el7.x86_64 (@rhel-7-server-rpms)
                 python36-libs(x86-64) = 3.6.8-10.el7
             Available: python36-libs-3.6.8-2.el7.ius.x86_64 (ius)
                 python36-libs(x86-64) = 3.6.8-2.el7.ius
  </code></pre>