from sys import argv script, input_file = argv def print_all(f): print(f.read()) def rewind(f): f.seek(0) def print_a_line(line_count, f): print(line_count, f.readline()) current_file = open(input_file) print("First let's print the whole file: \n") print_all(current_file) print("Now let's rewind, kind of like a tape.") rewind(current_file) print("Let's print three lines:") current_line = 1 print_a_line(current_line, current_file) #current_line = current_line + 1 current_line += 1 print_a_line(current_line, current_file) #current_line = current_line + 1 current_line += 1 print_a_line(current_line, current_file)