code: def complete_worker(self, text, line, begidx, endidx):
          ''' Tab-complete worker command. '''
          return  [i for i in PsiturkNetworkShell.worker_commands if \
                   i.startswith(text)f complete_worker(self, text, line, begidx, endidx):
          ''' Tab-complete worker command. '''
          return  [i for i in PsiturkNetworkShell.worker_commands if \
                   i.startswith(text)]
docs: Tab-complete worker command.