[{'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:import psycopg2 as pg2\nimport psycopg2.extras as pgex\nthis_host='34.211.59.66'\nthis_user='postgres'\nthis_password='postgres'\nconn = pg2.connect(host = this_host,\nuser = this_user,\npassword = this_password)\nsql_select = '''select created_at, location, tweet_content, cleaned_tweet, hashtags from tweets where hashtags is not null\nand (date_time >= NOW() - '7 day'::INTERVAL);'''\ncur = conn.cursor(cursor_factory=pgex.RealDictCursor)\ncur.execute(sql_select)\nrows = cur.fetchall()\nconn.close()\ndf = pd.DataFrame(rows)\ndf.reset_index(inplace = True)"}, {'role': 'assistant', 'content': "['helper_functions', 'load_data']"}]