code: def toDict(self):
          
          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
docs: Return a dictionary with the DataFrame data.