Updates row_heights in code_array

def _pys2row_heights(self, line):
        """Updates row_heights in code_array"""

        # Split with maxsplit 3
        split_line = self._split_tidy(line)
        key = row, tab = self._get_key(*split_line[:2])
        height = float(split_line[2])

        shape = self.code_array.shape

        try:
            if row < shape[0] and tab < shape[2]:
                self.code_array.row_heights[key] = height

        except ValueError:
            pass