def pivot(self, a, b, Keep=None, NullVals=None, order=None, prefix='<STR_LIT:_>'):
[data, coloring] = spreadsheet.pivot(X=self, a=a, b=b, Keep=Keep,<EOL>NullVals=NullVals, order=order, prefix=prefix)<EOL>data = data.view(tabarray)<EOL>data.coloring = coloring<EOL>return data<EOL>
Pivot with `a` as the row axis and `b` values as the column axis.

Method wraps::

        tabular.spreadsheet.pivot(X, a, b, Keep)