擅长:python、mysql、java
<p>你可以试试这个:</p>
<pre><code>list_1 = ['50', 'ALA', 'A', '53', '5', 'N', '4']
digits = []
for item in list_1:
for subitem in item.split():
if(subitem.isdigit()):
digits.append(subitem)
print(digits)
</code></pre>
<p>输出:</p>
<pre><code>['50', '53', '5', '4']
</code></pre>