[{'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:cor_mat= df[:].corr()\nmask = np.array(cor_mat)\nmask[np.tril_indices_from(mask)] = False\nfig=plt.gcf()\nfig.set_size_inches(30,12)\nsns.heatmap(data=cor_mat,mask=mask,square=True,annot=True,cbar=True)'}, {'role': 'assistant', 'content': 'result_visualization'}]