[{'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:def change_to_categorical(data, max_cat=10):\n  df = data.copy()\n  for col in df.columns:\n        if df[col].dtype == object or str(df[col].dtype).startswith(('int','float')):\n            count = len(df[col].unique())\n            if count <= max_cat:\n                df[col] = df[col].astype('category')\n  return df"}, {'role': 'assistant', 'content': "['data_preprocessing']"}]