擅长:python、mysql、java
<p>你的约会总是采用<code>YYYY-M</code>格式吗?如果是这样的话,那就相应地构建你的模式吧?此模式允许<code>YYYY-M</code>或<code>YYYY-MM</code>:</p>
<pre><code>>>> import re
>>> postline = "post date='2008-7' postCount='8' viewCount='24308' questionCount='5' answerCount='76' answeredQuestion='5'"
>>> pat = r"post date='(\d{4}-\d{1,2})'"
>>> re.search(pat, postline).group(1)
'2008-7'
</code></pre>