     "mimetype": "text/x-python",
     "name": "python",
     "nbconvert_exporter": "python",
     "pygments_lexer": "ipython2",
     "version": "2.7.9"
    }
   },
   "nbformat": 4,
   "nbformat_minor": 0
  }
 
</s> remove       "Success: test_pair_parentheses\n"
 </s> add       "Overwriting test_n_pairs_parentheses.py\n" </s> remove     "# %load test_n_pairs_parentheses.py\n",
 </s> add     "%%writefile test_n_pairs_parentheses.py\n", </s> remove     "    return result_set\n"
 </s> add     "    return result_set" </s> remove         assert_equal(solution(2), set(['(())', '()()']))
        assert_equal(solution(3), set(['((()))','(()())', '(())()', '()(())', '()()()']))
 </s> add         assert_equal(solution(2), set(['(())', 
                                       '()()']))
        assert_equal(solution(3), set(['((()))', 
                                       '(()())', 
                                       '(())()', 
                                       '()(())', 
                                       '()()()']))
   "version": "2.7.10"
     "mimetype": "text/x-python",
     "name": "python",
     "nbconvert_exporter": "python",
     "pygments_lexer": "ipython2",
   "version": "2.7.10"
    }
   },
   "nbformat": 4,
   "nbformat_minor": 0
  }
keep keep keep keep replace keep keep keep keep keep
 Cleaned up n pairs parentheses solution notebook and unit test. 
recursion_dynamic/n_pairs_parentheses/n_pairs_parentheses_solution.ipynb