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scipy.sparse.dia_matrix.

# power

dia_matrix.power(n, dtype=None)

  This function performs element-wise power.

  Parameters:
    n scalar

      n is a non-zero scalar (nonzero avoids dense ones creation) If zero power is desired, special case it to use `numpy.ones`

    dtype dtype, optional

      If dtype is not specified, the current dtype will be preserved.

  Returns:
    sparse array/matrix

      Result of raising all elements to the power n.

  Raises:
    NotImplementedError if n is a zero scalar

      If zero power is desired, special case it to use `np.ones(A.shape, dtype=A.dtype)`