## 10.10 Installing Python scripts in the ``Run script" menu

Python scripts can be installed as menu entries in the ``Run script" submenu. For this to work the Python script needs to implement a class with the same name as the script. This class needs to provide at least the methods `register` and `run`. The `register` method is passed a language setting as abbreviation of a locale (currently `en_US`, `fr`, `de`, `hu`, `pl`, `ru`, or `es`). The method needs to call the `registerMenuItem` function implemented in the `viewmol` module to pass a string back which will appear as the identification of this script in the submenu.

The `run` method does not take any argument, but is the entry point for the script when the user selects the corresponding menu item in the ``Run script" submenu.

A minimal Python script which will install itself in the ``Run script" menu would be the following (available at `$VIEWMOLPATH/scripts/template.py`):

      import viewmol

      class template:
        def run(self):
          print "This is a script template which just prints this silly message."

        def register(self, language):
          viewmol.registerMenuItem("Script template")

      # The following three lines are not necessary for running this script
      # from the "Run script" menu, but allow the script to also be run
      # standalone
      if __name__ == '__main__':
        script=template()
        script.run()

All scripts which are to appear in the ``Run script" menu have to be installed in the `scripts` subdirectory under `VIEWMOLPATH`.