擅长:python、mysql、java
<p>你可以用发电机来做。计数行(带<code>print</code>)取自<a href="https://stackoverflow.com/questions/2643850/what-is-a-good-way-to-do-countif-in-python">What is a good way to do countif in Python</a></p>
<pre><code>from statistics import mode
arr = [[1,'cat'][1,'dog'][2,'fish']]
modeNum = mode(x[0] for x in arr)
print(sum(1 for x in arr if x[0] == modeNum))
</code></pre>