code: def where(self, test):
      """
      Create a new :class:`.Table` with only those rows that pass a test.
  
      :param test:
          A function that takes a :class:`.Row` and returns :code:`True` if
          it should be included in the new :class:`.Table`.
      :type test:
          :class:`function`
      :returns:
          A new :class:`.Table`.
      """
      rows = []
  
      if self._row_names is not None:
          row_names = []
      else:
          row_names = None
  
      for i, row in enumerate(self._rows):
          if test(row):
              rows.append(row)
  
              if row_names is not None:
                  row_names.append(self._row_names[i])
  
      return self._fork(rows, row_names=row_names)
  
label_desc: Use image node_id 1 for calling a global function with example usage: where(test) and returns: self