I am new to Python , I have text file for data there are lines of keypharses KP1;Kp2;..;;Kp_A;Kp_B.... I want to remove all the Keypharse before Peos so I need to remove all KP1;Kp2;..;; and keep the rest. So , I read the text file using this command data = pd.read_csv('train_trg.txt', sep="; ", ...