Python - 字典中的重复值

Question

我写了下面的代码:

def word_len_dict(text):
    the_dict = {}
    user_input = str(text)
    words_list = user_input.split()
    for word in words_list:
        if len(word) in the_dict:
            the_dict[len(word)] += [word]
        else:
            the_dict[len(word)] = [word]
    return the_dict

正文是:

"the faith that he had had had had an affect on his life"

我的输出结果如下:

2 - ['an', 'he', 'on']
3 - ['had', 'had', 'had', 'had', 'his', 'the']
4 - ['life', 'that']
5 - ['faith']
6 - ['affect']

我希望我的输出是:

2 - ['an', 'he', 'on']
3 - ['had', 'his', 'the']
4 - ['life', 'that']
5 - ['faith']
6 - ['affect']

将其添加到字典时，如何阻止它重复值？

Answer 1

from collections import defaultdict

def word_len_dict(text):
    words_by_len = defaultdict(set)
    for word in text.split():
        words_by_len[len(word)].add(word)
    return words_by_len

text = "the faith that he had had had had an affect on his life"
word_len_dict(text)

给予

{
    2: {'an', 'he', 'on'},
    3: {'had', 'his', 'the'},
    4: {'life', 'that'},
    5: {'faith'},
    6: {'affect'}
}