[{'role': 'system', 'content': "You are an expert in machine learning and your task is to classify code snippets into one of the following categories: ['helper_functions', 'load_data', 'data_exploration', 'data_preprocessing', 'evaluation', 'modelling', 'prediction', 'result_visualization', 'save_results', 'comment_only']."}, {'role': 'user', 'content': "Identify the single most appropriate category to which the provided code belongs. Provide your response as a single category label without any additional information, commentary, or personal opinions.\\nPython Code:numNearestNeighbor = 20\nnumValidation = 10\ndef main():\nfor trainData, trainLabels, validData, validLabels in genTrainValidFolds():\nprint('Validation Data and Labels shape: ', validData.shape, validLabels.shape)\nprint('Training Data and Labels shape: ', trainData.shape, trainLabels.shape)\nobj_KNN = KNN()\nobj_KNN.train(trainData, trainLabels)\npredLabels, nearestImageIndice  = obj_KNN.predict(numNearestNeighbor, validData, numValidation, distanceMeasure='L1')\nvisualize(trainData, validData, nearestImageIndice, imageSize=32, limit_images=10)\nbreak\nmain()"}, {'role': 'assistant', 'content': 'modelling'}]