擅长:python、mysql、java
<p>使用正则表达式:</p>
<pre><code>import re
s1 = "R ABC 4.4"
s2 = "R Ciapara 4.4A1(Active)"
print(re.findall(r"\d+\.\d+", s1))
print(re.findall(r"\d+\.\d+", s2))
</code></pre>
<p><strong>输出:</strong></p>
<pre><code>['4.4']
['4.4']
</code></pre>