有没有办法从pyspark中graphframe的图中找到一个具有给定中心节点的诱导子图？我试过用母题做一个诱导子图，但没有成功。
我试过使用networkx的ego图，它可以正常工作，但是对于大型图（12m+边），加载整个图需要很长时间。
下面是一个中心节点为“a”的示例

v = sqlc.createDataFrame([
  ("a", "Alice", 34),
  ("b", "Bob", 36),
  ("c", "Charlie", 30),
  ("d", "David", 29),
  ("e", "Esther", 32),
  ("f", "Fanny", 36),
  ("g", "Gabby", 60)
], ["id", "name", "age"])

# Edge DataFrame

e = sqlc.createDataFrame([
  ("a", "b", "friend"),
  ("b", "c", "friend"),
  ("c", "b", "friend"),
  ("f", "c", "friend"),
  ("e", "f", "friend"),
  ("e", "d", "friend"),
  ("d", "a", "friend"),
  ("a", "e", "friend"),
  ("b", "d", "friend")
], ["src", "dst", "relationship"])

# Create a GraphFrame

g = GraphFrame(v, e)

get_community(g,1)

def create_motif(length: int) -> str:
        """Create a motif string.
        Args:
            length (int):
        """

        motif_path = "(start)-[edge0]->"
        for i in range(1, length):
            motif_path += "(n%s);(n%s)-[edge%s]->" % (i - 1, i - 1, i)
        motif_path += "(end)"
        return motif_path

def get_community(G,depth):

    motif_path = create_motif(depth)
    current_motif = G.find(motif_path)\

    current_motif.select(f.col("start.*"),"*").show()

退货：

+---+-----+---+--------------+--------------+---------------+                   
| id| name|age|         start|         edge0|            end|
+---+-----+---+--------------+--------------+---------------+
|  a|Alice| 34|[a, Alice, 34]|[a, e, friend]|[e, Esther, 32]|
|  a|Alice| 34|[a, Alice, 34]|[a, b, friend]|   [b, Bob, 36]|
+---+-----+---+--------------+--------------+---------------+

你应该回来

+---+-----+---+--------------+--------------+---------------+                   
| id| name|age|         start|         edge0|            end|
+---+-----+---+--------------+--------------+---------------+
|  a|Alice| 34|[a, Alice, 34]|[a, e, friend]|[e, Esther, 32]|
|  a|Alice| 34|[a, Alice, 34]|[a, b, friend]|   [b, Bob, 36]|
|  a|Alice| 34|[a, Alice, 34]|[a, d, friend]| [d, David, 29]|
|  b|  Bob| 36|[b,   Bob, 36]|[b, d, friend]| [d, David, 29]|
+---+-----+---+--------------+--------------+---------------+