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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 toDict(self):
 """ Return a dictionary with the DataFrame data. """

        d = {}
        nindices = self.getNumIndices()
        for i in range(self.getNumRows()):
            row = list(self.getRowByIndex(i))
            if nindices > 1:
                key = tuple(row[:nindices])
            elif nindices == 1:
                key = row[0]
            else:
                key = None
            if len(row) - nindices == 0:
                d[key] = None
            elif len(row) - nindices == 1:
                d[key] = row[nindices]
            else:
                d[key] = tuple(row[nindices:])
        return d