File methods
	>>> f = file(‘A_file.txt’, ‘r’) >>> f.read()       # return all contents >>> f.readline()      # return one line >>> f.readlines()     # return list of lines >>> f.seek(position)     # move to position >>> position = f.tell()  # get current position >>> f = file(‘A_file.txt’, ‘w’) >>> f.write(a_string) >>> f.writelines(a_list_of_strings) >>> f.close()