code: def add_row(self, array):
          
  
          self._check_row_size(array)
  
          if not hasattr(self, "_dtype"):
              self._dtype = ["a"] * self._row_size
  
          cells = []
          for i, x in enumerate(array):
              cells.append(self._str(i, x))
          self._rows.append(cells)
          return self
docs: Add a row in the rows stack
  
          - cells can contain newlines and tabs