擅长:python、mysql、java
<p>计数器列表的项目只能以字符串的形式存储,之后可以使用<code>eval()</code>对字符串进行求值</p>
<p>代码:</p>
<pre><code>lst = ["dog cat mouse", " cat mouse", "mouse mouse cat"]
res = {}
res2 = []
for i in lst:
for j in i.split(' '):
if j not in res.keys():
res[j] = 1
else:
res[j] += 1
for i in lst:
res2.append('+'.join([str(res[j]) for j in i.split(' ')]))
print(res2)
</code></pre>
<p>结果(<code>res2</code>)应该类似于<code>['1+3+4', '3+4', '4+4+3']</code></p>
<p>我想这就是你想要的</p>