[{'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:start = datetime.datetime(2007,7,7)\nend = datetime.datetime(2017,7,7)\ntest_symbol = 'aapl'\nmydata_error = 0\ntry:\nprint('Trying to get some data from Google API....')\ndf = pdr.DataReader(test_symbol,'google',start,end)\nmydata_error = 0\nexcept RemoteDataError:\nprint('Any data were returned :-(')\ndf.drop(df.index, inplace=True)\nmydata_error = 1\ndf.shape[0], mydata_error\ndf.head()"}, {'role': 'assistant', 'content': 'load_data'}]