[{'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:import numpy as np\nimport pandas as pd\ndf = pd.read_csv('newt.csv')\ndf = df[df.SchoolYear<2010]\ndf = df.drop(['Target','Y2','LongTract','Zip','NextYearCount','TotalCountByTractGrade'],axis=1) #exclude some columns\ntest_df = df[df.SchoolYear>2007] #Test set 2008, 2009\ntrain_df = df[df.SchoolYear<=2007] # Training set from 2001 to 2007\ndf.head()"}, {'role': 'assistant', 'content': "['helper_functions', 'load_data', 'data_exploration']"}]