擅长:python、mysql、java
<p>这应该适用于您的目的:</p>
<pre><code>from collections import defaultdict
counter_dict = defaultdict(list)
word_list = [(word[0], word) for word in my_string.lower().split()] #index 0 and the word is taken
for letter, word in word_list:
counter_dict[letter].append(word)
</code></pre>