擅长:python、mysql、java
<pre><code>D = {'key1': valueA,
'key2': {'key21': valueB,
'key22': valueC}}
def nested_getter(root, path):
for elem in path:
root = root[elem]
return root
</code></pre>
<p>有了它,您可以:</p>
<pre><code>>>> nested_getter(D, ('key2', 'key22'))
3
</code></pre>