擅长:python、mysql、java
<p>如果没有列表理解,它将很简单</p>
<pre><code>is_weighted = False
is_directed = False
graph_list = graph_str.splitlines()
num_verticies = int(graph_list[0].split()[1])
graph_list.pop(0)
adj_list = [] #create an empty list to append to
for x in range(num_verticies): #start the for loop
adj_list.append([]) #append an empty list the num_vertices times
print(adj_list)
</code></pre>