擅长:python、mysql、java
<p>您应该使用<a href="http://docs.python.org/2/library/importlib.html" rel="nofollow">importlib</a></p>
<pre><code>attribute = 'first_class.second_class.third_class.id'
attribute_pieces = attribute.split('.')
id = getattr(importlib.import_module('.'.join(attribute_pieces[:-1]), attribute_pieces[-1])
</code></pre>