[{'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 get_rank(token):\n    """Step up with token.head until it reaches the root. Returns with step number and root"""\n    i = 0\n    next_token = token\n    while(next_token!=next_token.head):\n        i+=1\n        next_token=next_token.head\n    return i, next_token\n\ndef child_count(token):\n    cc = 0\n    for child in token.children:\n        cc+=1\n    return cc'}, {'role': 'assistant', 'content': "['helper_functions', 'comment_only']"}]