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# Deprecated low-level permutations

`sage.combinat.permutation_nk.``PermutationsNK`(n, k)

  This is deprecated in trac ticket #16472. Use `Permutations` instead (or `itertools.permutations` for iteration).

  EXAMPLES:

      sage: from sage.combinat.permutation_nk import PermutationsNK
      sage: P = PermutationsNK(10,4)
      doctest:...: DeprecationWarning: PermutationsNK is deprecated. Please
      use Permutations instead (or itertools.permutations for iteration).
      See http://trac.sagemath.org/16472 for details.
      sage: [ p for p in PermutationsNK(3,2)]
      [[0, 1], [0, 2], [1, 0], [1, 2], [2, 0], [2, 1]]
      sage: PermutationsNK(3,2).cardinality()
      6
      sage: PermutationsNK(5,4).cardinality()
      120

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