擅长:python、mysql、java
<p>因为:</p>
<pre><code>print "%s" + "/" + "%s" + "/" + "%s" % (now.month, now.day, now.year)
</code></pre>
<p>与此相同,因为<a href="https://docs.python.org/2/reference/expressions.html#operator-precedence" rel="noreferrer">operator precedence</a>(注意额外的括号)</p>
<pre><code>print "%s" + "/" + "%s" + "/" + ("%s" % (now.month, now.day, now.year))
</code></pre>