我的文件：

目标：读取txt文件并返回字典

我所拥有的：

def load_snacks(snack_file: TextIO) -> Tuple[Dict[str,List[str]],Dict[str,List[str]]]:
    """Return a two-item tuple containing a "healthysnack_to_junkfood" dictionary
    and a "healthysnack_to_healthysnack" dictionary with the data from snack_file.
    """
    snack_H2J = {}
    snack_H2H = {}

    line = snack_file.readline().strip()

    while line != '':
    # due to structure of the file,line contains a healthy snack name

        healthysnack_name = line

    # properly format the 1st healthy snack name,use helper fcn (see below for helper fcn)

        flip_name_and_del_comma(healthysnack_name)  

        healthy_list = []
        junk_list = []        

        line = snack_file.readline().strip()
        while line != '\n':
            if ',' in line:
                snack_H2J[healthysnack_name] = line
                a = flip_name_and_del_comma(line) 
                healthy_list.append(a)

            else:
                snack_H2H[healthysnack_name] = line
                junk_list.append(line)

    line = snack_file.readline().strip()

    return (snack_H2J,snack_H2H)

下面是我的助手；我已经验证了这个方法

def flip_name_and_del_comma(s: str) -> str:
    """ Retrun a new str that reverses the format name order from 'colour,healthy snack name' to 
    'healthy snack name to colour'

    >>> flip_name_and_del_comma('orange,carrot')
    'carrot orange'
    >>> flip_name_and_del_comma('yellow,mango')
    'mango yellow'
    """
    s_reversed = ','.join(reversed(s.split(',')))

    s_comma_delete = s_reversed.replace(',',' ')

    return s_comma_delete