擅长:python、mysql、java
<p>使用正则表达式<code>re.match</code></p>
<p><strong>Ex:</strong></p>
<pre><code>import re
textList = ["3", "2 string", "3FOO"]
newList = []
ptrn = re.compile(r"(\d+)")
for i in textList:
m = ptrn.match(i)
if m:
newList.append(m.group(0))
print(newList) # -->['3', '2', '3']
</code></pre>