擅长:python、mysql、java
<p>我建议改用字典。你知道吗</p>
<pre><code>a = [0, 1]
b = [2, 4]
c = [2, 0]
d = [4, 3]
e = [a, b, c, d]
neighbour_list = {}
for x, y in e:
neighbour_list.setdefault(x, [])
neighbour_list[x].append(y)
neighbour_list.setdefault(y, [])
neighbour_list[y].append(x)
neighbour_list = list(neighbour_list.values())
print(neighbour_list)
</code></pre>
<p>运行它可以:</p>
<pre><code>[[1, 2], [0], [4, 0], [4], [2, 3]]
</code></pre>