title: Installing gir1.2-gtk-3.0 on Centos
body: <p>On Ubuntu there is a package for installing <strong>gir1.2-gtk-3.0</strong>:</p>
  
  <pre><code>sudo apt install gir1.2-gtk-3.0
  </code></pre>
  
  <p>Centos 'dnf provides gir1*' results in error: No Matches found</p>
  
  <p>The package can be found on <a href="https://github.com/roojs/gir-1.2-gtk-3.0" rel="nofollow noreferrer">https://github.com/roojs/gir-1.2-gtk-3.0</a>, but there is no installation script, only files with extension *.gir</p>
  
  <p>How can it be installed manually?</p>
  
  <p>The installation is necessary to avoid:</p>
  
  <p>gi.require_version("Gtk", "3.0")
  Python: Namespace Gtk not available</p>
  
  <p>Other packages gobject-introspection, python3-gi are alredy installed</p>