擅长:python、mysql、java
<p>当一个元素有多个子元素时,如<a href="http://www.crummy.com/software/BeautifulSoup/bs3/documentation.html#string" rel="nofollow">The Docs</a>中所示,则发生None</p>
<p>去除<code>None</code>的最简单方法如下:</p>
<pre><code>for tr in rows:
cols = tr.findAll('td')
for td in cols:
text = td.find(text=True)
if text is not None:
print text,
print
</code></pre>
<p>它将检查<code>text = None</code>如果是,则不会打印它</p>