code: def get_session(self, app_path, session_id):
          ''' Get an active a session by name application path and session ID.
  
          Args:
              app_path (str) :
                  The configured application path for the application to return
                  a session for.
  
              session_id (str) :
                  The session ID of the session to retrieve.
  
          Returns:
              ServerSession
  
          '''
          if app_path not in self._applications:
              raise ValueError("Application %s does not exist on this server" % app_path)
          return self._applications[app_path].get_session(session_idf get_session(self, app_path, session_id):
          ''' Get an active a session by name application path and session ID.
  
          Args:
              app_path (str) :
                  The configured application path for the application to return
                  a session for.
  
              session_id (str) :
                  The session ID of the session to retrieve.
  
          Returns:
              ServerSession
  
          '''
          if app_path not in self._applications:
              raise ValueError("Application %s does not exist on this server" % app_path)
          return self._applications[app_path].get_session(session_id)
docs: Get an active a session by name application path and session ID.
  
          Args:
              app_path (str) :
                  The configured application path for the application to return
                  a session for.
  
              session_id (str) :
                  The session ID of the session to retrieve.
  
          Returns:
              ServerSession