title: How to make custom tray icon for an application?
body: <p>I need a custom tray icon for my application written in python. I am using the code from ubuntu wiki.
  <a href="https://wiki.ubuntu.com/DesktopExperienceTeam/ApplicationIndicators#Python_version" rel="nofollow">https://wiki.ubuntu.com/DesktopExperienceTeam/ApplicationIndicators#Python_version</a></p>
  
  <p>The problem is, I can not create image from file. So I assume I need the name for my icon. Something like Gtk.STOCK_HOME or "indicator-messages". I can't find any documentation how to define the name for my icon in the system.</p>
  
  <p>Any DOCs? For GTK3 Python 2.7 are used in my app.</p>