[{'role': 'system', 'content': "You are an expert in machine learning and your task is to classify code snippets into one of the following categories: ['helper_functions', 'load_data', 'data_exploration', 'data_preprocessing', 'evaluation', 'modelling', 'prediction', 'result_visualization', 'save_results', 'comment_only']."}, {'role': 'user', 'content': 'Identify the single most appropriate category to which the provided code belongs. Provide your response as a single category label without any additional information, commentary, or personal opinions.\\nPython Code:class LabelEncoderPipelineFriendly(LabelEncoder):\n    \n    def fit(self, X, y=None):\n        """this would allow us to fit the model based on the X input."""\n        super(LabelEncoderPipelineFriendly, self).fit(X)\n        \n    def transform(self, X, y=None):\n        return super(LabelEncoderPipelineFriendly, self).transform(X).reshape(-1, 1)\n\n    def fit_transform(self, X, y=None):\n        return super(LabelEncoderPipelineFriendly, self).fit(X).transform(X).reshape(-1, 1)'}, {'role': 'assistant', 'content': 'data_preprocessing'}]