[{'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:# function to bin the timestamp in time of day\n\ndef bintod(x):\n    if x < 3:\n        return 0\n    elif x < 8:\n        return 1\n    elif x < 20:\n        return 2\n    elif x < 23:\n        return 3\n    else:\n        return 0 \n# functions to assign region based on latitude and longitude\ndef lngregion(x):\n    if x < 80:\n        return 1\n    elif x < 90:\n        return 2\n    elif x < 100:\n        return 3\n    elif x < 110:\n        return 4\n    elif x < 120:\n        return 5\n    elif x < 130:\n        return 6\n    elif x < 140:\n        return 7\n    else:\n        return 0\nnlng = 8\nnlat = 9\ndef latregion(x):\n    if x < 20:\n        return 1\n    elif x < 25:\n        return 2\n    elif x < 30:\n        return 3\n    elif x < 35:\n        return 4\n    elif x < 40:\n        return 5\n    elif x < 45:\n        return 6\n    elif x < 50:\n        return 7\n    elif x < 55:\n        return 8    \n    else:\n        return 0      '}, {'role': 'assistant', 'content': "['data_preprocessing']"}]