[{'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:mcmc = pm.MCMC(model)\nmcmc.sample(50000, 5000) # 50000 steps, with a burn in period of 5000\np_samples = mcmc.trace("p")[:]\nplt.hist(p_samples, bins=40, normed=True)\nplt.axvline(x=true_coin_bias, c="k")\nplt.xlabel("p")\nplt.title("Approximate posterior of p")\nplt.xlim(0,1);'}, {'role': 'assistant', 'content': 'result_visualization'}]