[{'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:ax = df.MonthsProgramming.hist(bins=20, log=True)\n_ = (ax.set_title('Months of Programming Experience'),\nax.set_xlabel('Months of experience'),\nax.set_ylabel('Number of coders (log)'))\nmonths_median = df.MonthsProgramming.median()\n_ = (ax.axvline(months_median, color='black', linewidth=2),\nax.text(months_median+6, 2,\n'median = {:.0f} months'.format(months_median),\nrotation=90, fontsize=13, fontweight='bold',\nhorizontalalignment='left', verticalalignment='bottom')\n)"}, {'role': 'assistant', 'content': 'data_exploration'}]