[{'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:#adding dummy varibles to categorical variables dropping the souce columns\nweather_df=pd.get_dummies(final_df['weather'],prefix='w',drop_first=True)\nyr_df=pd.get_dummies(final_df['year'],prefix='y',drop_first=True)\nmonth_df=pd.get_dummies(final_df['month'],prefix='m',drop_first=True)\nhour_df=pd.get_dummies(final_df['hour'],prefix='h',drop_first=True)\nseason_df=pd.get_dummies(final_df['season'],prefix='s',drop_first=True)\nday_df=pd.get_dummies(final_df['day'],prefix='d',drop_first=True)\n\nfinal_df=final_df.drop(['weather','year','month','hour','season','day'], axis=1)\n\nfinal_df=final_df.join(weather_df)\nfinal_df=final_df.join(yr_df)\nfinal_df=final_df.join(month_df)                     \nfinal_df=final_df.join(hour_df)\nfinal_df=final_df.join(season_df)\nfinal_df=final_df.join(day_df)"}, {'role': 'assistant', 'content': 'data_preprocessing'}]