擅长:python、mysql、java
<p>您可以使用递归<code>defaultdict</code>:</p>
<pre><code>>>> from collections import defaultdict
>>> l = lambda: defaultdict(l)
>>> d = defaultdict(l)
>>> d['123']['4234']['asd']['dsaf'] = 4
>>> d
defaultdict(<function <lambda> at 0x15f9578>, {'123': defaultdict(<function <lambda> at 0x15f9578>, {'4234': defaultdict(<function <lambda> at 0x15f9578>, {'asd': defaultdict(<function <lambda> at 0x15f9578>, {'dsaf': 4})})})})
</code></pre>