David W. Lambert <lamber...@corning.com> added the comment: Mathematica indicates for the user to define it later. An error.
In[3]:= Permutations[{1,2},{-2}] Permutations::nninfseq: Position 2 of Permutations[{1, 2}, {-2}] must be All, Infinity, a non-negative integer, or a List whose first element (required) is a non-negative integer, second element (optional) is a non-negative integer or Infinity, and third element (optional) is a nonzero integer. Out[4]= Permutations[{1, 2}, {-2}] _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue4816> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com