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scipy.sparse.csr_matrix.

# power

csr_matrix.power(n, dtype=None)

  This function performs element-wise power.

  Parameters:
    nscalar

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

    dtypeIf dtype is not specified, the current dtype will be preserved.
  Raises:
    NotImplementedErrorif n is a zero scalar

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