打印n元树python的所有路径

问题描述:

我想在python的N元树中打印从根到叶节点的所有路径.我有一个想法可以在二叉树中打印出来,但是在N-ary中这样做并不能给我正确的结果.

I want to print all the paths from the root to the leaf nodes in an N-ary tree in python. I have an idea to print it in binary tree but doing this in N-ary doesn't give me the correct result.

我在这里弹出并访问子节点列表中的每个节点,但不确定如何分别打印每个叶节点的路径.

I'm poping and Visiting each node from the child node list here but not sure how to print the paths separately for each leaf node.

class createnode:
 def __init__(self,val):
   self.data=val
   self.child=[]

def traverse(root):
    global path
    if root.child:
     while(len(root.child)>0):
       x=root.child.pop(0)
       path.append(x.data)
       traverse(x)
    else:
      printarray(path)

def printarray(path):
  print(path)


root = createnode(10)
root.child.append(createnode(2))
root.child.append(createnode(4))

root.child[0].child.append(createnode(15))
root.child[0].child.append(createnode(20))
root.child[0].child.append(createnode(25))
root.child[0].child.append(createnode(30))

root.child[1].child.append(createnode(45))
root.child[1].child.append(createnode(50))
root.child[1].child.append(createnode(55))
root.child[1].child.append(createnode(60))
path=[]
total_val=30
traverse(root)

预期输出:

10,2,15

10,2,20

10,2,25

10,2,30

10、4、45

10、4、50

10,4,55

10,4,60

尝试一下:

def traverse(node, path = []):
    path.append(node.data)
    if len(node.child) == 0:
        print(path)
        path.pop()
    else:
        for child in node.child:
            traverse(child, path)
        path.pop()

在您的示例中产生以下输出:

Produces the following output with your example:

[10, 2, 15]
[10, 2, 20]
[10, 2, 25]
[10, 2, 30]
[10, 4, 45]
[10, 4, 50]
[10, 4, 55]
[10, 4, 60]