擅长:python、mysql、java
<p>您可以使用<a href="https://docs.python.org/3/library/itertools.html#itertools.combinations" rel="nofollow noreferrer">^{<cd1>}</a>来实现:</p>
<pre><code>s = 'velvet evening purse bags'
from nltk import word_tokenize
words = word_tokenize(s)
from itertools import combinations
pairs = [' '.join(comb) for comb in combinations(words, 2)]
print(pairs)
</code></pre>
<p>输出:</p>
<pre><code>['velvet evening', 'velvet purse', 'velvet bags', 'evening purse', 'evening bags', 'purse bags']
</code></pre>