Python中许多列表的串联 [英] Concatenation of many lists in Python

问题描述

假设我有一个像这样的函数:

Suppose I have a function like this:

def getNeighbors(vertex)

返回与给定顶点相邻的顶点列表.现在，我想创建一个包含所有邻居的列表.我这样做是这样的:

which returns a list of vertices that are neighbors of the given vertex. Now I want to create a list with all the neighbors of the neighbors. I do that like this:

listOfNeighborsNeighbors = []
for neighborVertex in getNeighbors(vertex):
    listOfNeighborsNeighbors.append(getNeighbors(neighborsVertex))

有没有更多的Python方式来做到这一点?

Is there a more pythonic way to do that?

推荐答案

[x for n in getNeighbors(vertex) for x in getNeighbors(n)]

或

sum(getNeighbors(n) for n in getNeighbors(vertex), [])

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