Optimal Classification of Breast Cancer Wisconsin (Diagnostic) Database provided in Scikit Learn Data-set. I have written a code for the classification of the Breast Cancer data provided by Scikit Learn Data-set. It is an OPTIMIZATED code with 65% Training Data and 35% Test Data. The value of k i.e. the number of nearest neighbor to be considered is 5. Score of my code is 0.945 based of the test data.