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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def toList(self):
 """ Return a list with the DataFrame data. """

        if self.getNumCols() > 1:
            return [
                tuple(self.getRowByIndex(i))
                for i in range(self.getNumRows())
            ]
        else:
            return [
                self.getRowByIndex(i)[0]
                for i in range(self.getNumRows())
            ]