docs: def set_attribute(file, element, key, value):
      '''
      Set the requested attribute key and value for matched xpath element.
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' xml.set_attribute /tmp/test.xml ".//element[@id='3']" editedby "gal"
      '''
      try:
          root = ET.parse(file)
          element = root.find(element)
      except AttributeError:
          log.error("Unable to find element matching %s", element)
          return False
      element.set(key, str(value))
      root.write(file)
      return True