[{'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:staff_df = pd.DataFrame([{'Name': 'Kelly', 'Role': 'Director of HR'},\n{'Name': 'Sally', 'Role': 'Course liasion'},\n{'Name': 'James', 'Role': 'Grader'}])\nstaff_df = staff_df.set_index('Name')\nstudent_df = pd.DataFrame([{'Name': 'James', 'School': 'Business'},\n{'Name': 'Mike', 'School': 'Law'},\n{'Name': 'Sally', 'School': 'Engineering'}])\nstudent_df = student_df.set_index('Name')\nprint(staff_df.head())\nprint()\nprint(student_df.head())"}, {'role': 'assistant', 'content': "['load_data', 'data_exploration']"}]