擅长:python、mysql、java
<p>您可能希望返回该级别上所有项的列表:</p>
<pre><code>tree = {"k-b":
{"p-a":
{"c-a":{"o-a":{}, "o-b":{}},
"c-b":{"o-a":{}}},
"p-b":
{"c-a":{"o-a":{},"o-b":{}}}}}
def branches(tree, level):
if level == 0:
#print(tree.keys())
return tree.keys()
else:
return [branches(tree[i], level-1) for i in tree.keys()]
print(branches(tree, 2))
</code></pre>
<p>输出:</p>
<pre><code>[[dict_keys(['c-a', 'c-b']), dict_keys(['c-a'])]]
</code></pre>