code: def clean_up(self):
          ''' Clean up child and orphaned processes. '''
          if self.tunnel.is_open:
              print 'Closing tunnel...'
              self.tunnel.close()
              print 'Done.'
          else:
              pasf clean_up(self):
          ''' Clean up child and orphaned processes. '''
          if self.tunnel.is_open:
              print 'Closing tunnel...'
              self.tunnel.close()
              print 'Done.'
          else:
              pass
docs: Clean up child and orphaned processes.