title: how to install python3-tk in centos?
body: <p>I need to install python3-tk in order to use matplotlib. </p>
  
  <pre><code>I have tried: 
  
  (python_3.4_numerical) [lpuggini@machinelearn-1 ~]$ sudo yum install python3-tk
  [sudo] password for lpuggini: 
  Loaded plugins: fastestmirror, langpacks
  Loading mirror speeds from cached hostfile
   * base: mirrors.clouvider.net
   * epel: epel.check-update.co.uk
   * extras: mirror.sov.uk.goscomb.net
   * updates: mirrors.clouvider.net
  No package python3-tk available.
  Error: Nothing to do
  (python_3.4_numerical) [lpuggini@machinelearn-1 ~]$ 
  </code></pre>
  
  <p>but it is not working. </p>
  
  <p>How can I fix it?</p>
  
  <p>EDIT:
  Installing from pip does not work:</p>
  
  <pre><code>(python_3.4_numerical) [lpuggini@machinelearn-1 ~]$ pip install pygtk
  Collecting pygtk
    Using cached pygtk-2.24.0.tar.bz2
      Complete output from command python setup.py egg_info:
      ********************************************************************
      * Building PyGTK using distutils is only supported on windows. *
      * To build PyGTK in a supported way, read the INSTALL file.    *
      ********************************************************************
  
      ----------------------------------------
  Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-nzjsuhx3/pygtk/
  (python_3.4_numerical) [lpuggini@machinelearn-1 ~]$ 
  </code></pre>