code: def to_numpy(self):
          
          assert HAS_NUMPY, 'numpy is not installed.'
          import numpy
          return numpy.transpose(numpy.asarray([self[x] for x in self.column_names()]))
docs: Converts this SFrame to a numpy array
  
          This operation will construct a numpy array in memory. Care must
          be taken when size of the returned object is big.
  
          Returns
          -------
          out : numpy.ndarray
              A Numpy Array containing all the values of the SFrame