擅长:python、mysql、java
<p>可以使用以下正则表达式:</p>
<pre><code>import re
SampleString = 'A, B,B, M1, 3, 44, 45, 46, 47, G, 1, 33'
CleanString = re.sub(r'(\b\d+)(\s*,\s*)(?=\d+\b)', r'\1,', SampleString)
print(CleanString)
</code></pre>
<p>输出:</p>
<pre><code>A, B,B, M1, 3,44,45,46,47, G, 1,33
</code></pre>