[{'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:point = pd.DataFrame(np.zeros((len(matches),8)))\nfor i in range(len(matches)):\nif matches['home_team_goal'][i] > matches['away_team_goal'][i]:\npoint.iloc[i][6] = 3\npoint.iloc[i][7] = 0\nelif matches['home_team_goal'][i] < matches['away_team_goal'][i]:\npoint.iloc[i][6] = 0\npoint.iloc[i][7] = 3\nelse:\npoint.iloc[i][6] = 1\npoint.iloc[i][7] = 1\npoint_colnames = ['match_id', 'home_team', 'away_team','season','stage','date' ,'home_point', 'away_point']\npoint.columns = point_colnames\nfor i in point_colnames[0:6]:\npoint[i] = matches[i]\npoint.head()"}, {'role': 'assistant', 'content': 'data_preprocessing'}]