[{'role': 'system', 'content': "You are an expert in machine learning and your task is to classify the code snippets into categories from the provided list of categories. List of categories: ['helper_functions', 'load_data', 'data_exploration', 'data_preprocessing', 'evaluation', 'modelling', 'prediction', 'result_visualization', 'save_results', 'comment_only']"}, {'role': 'user', 'content': "Identify to which category the provided code belongs and assign the code snippet to at least 1 but up to 5 categories based on the probabilities, ignore if the probability of the category is negligible. Strictly provide your response as a list. Avoid providing any additional information, commentary, or personal opinions.\\nPython Code:df_avg_sales_customers = pd.DataFrame({'Sales':  avg_sales_customers['Sales'],\n                                         'Customers': avg_sales_customers['Customers']}, \n                                         index = avg_sales_customers.index)\n\ndf_avg_sales_customers = df_avg_sales_customers.reset_index()\n\ndf_stores_avg = df_avg_sales_customers.join(df_store.set_index('Store'), on='Store')\ndf_stores_avg.head()"}, {'role': 'assistant', 'content': "['data_preprocessing']"}]