擅长:python、mysql、java
<p>使用<code>collections.defaultdict</code></p>
<p><strong>Ex:</strong></p>
<pre><code>from collections import defaultdict
allName = {
'name1': ['sainz', 'gasly'],
'name2': ['sainz', 'gasly', 'stroll'],
'name3': ['sainz', 'gasly', 'stroll']
}
res = defaultdict(int)
for k, v in allName.items():
for i in v:
res[i]+=1
for k, v in res.items():
print(f"{k}: {v}")
</code></pre>
<p><strong>输出:</strong></p>
<pre><code>sainz: 3
gasly: 3
stroll: 2
</code></pre>