本文整理汇总了Python中tree.Node.get_child_by_id方法的典型用法代码示例。如果您正苦于以下问题：Python Node.get_child_by_id方法的具体用法？Python Node.get_child_by_id怎么用？Python Node.get_child_by_id使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类tree.Node的用法示例。
在下文中一共展示了Node.get_child_by_id方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: __init__
# 需要导入模块: from tree import Node [as 别名]
# 或者: from tree.Node import get_child_by_id [as 别名]
class TreeHandler:
"""
A class to construct a list to a tree structure.
"""
def __init__(self,nodesList, idFn, pidFn, rootId=None):
""" Parameters:
nodesList - the list to be constructed, each row in the nodesList should hold node's id and node's parent id bascally.
idFn - the function to get the node's from each row's data in the list
pidFn- the function to get the parent node's id from each row's data in the list
rootId - the id of the root node, if it's gived, the nodesList holds a root node's info.
"""
self.nodesList = nodesList
self.idFn = idFn
self.pidFn= pidFn
# create a root node first, the root node is the tree in fact.
if rootId:
self.rootNode = self.make_node(rootId)
else:
self.rootNode = Node('root')
self.rootNode.data = []
self.make_tree()
return
def make_node(self,nodeId):
"""
Filters the row from self.nodesList by nodeId,
and create a new Node.
After node's creation,the row will be removed from the nodesList.
"""
row = filter( lambda i: self.idFn(i)==nodeId , self.nodesList)[0]
#print 'make_node,row is %s, node id is %s'%(row,nodeId)
node = Node(nodeId)
node.data = row
self.nodesList.remove(row)
return node
def make_tree(self):
"""
Constructs the tree by iterating nodesList.
"""
while self.nodesList:
row = self.nodesList.pop(0)
nodeId = self.idFn(row)
#print 'make_tree,row is %s, node id is %s'%(row,nodeId)
try:
node = self.rootNode.get_child_by_id(nodeId)
except:
node = None
if not node:
node = Node(nodeId)
node.data = row
#print 'make_tree,created a new node, id is ',node.id
parentId = self.pidFn(row)
# creates it's parent node and recursivelly creates the ancestor nodes of this node.
self.parent(parentId, node)
#print '****make_tree is end, maked branch is ******\n',self.rootNode
#print 70*'-'
return
def parent(self, parentId, child):
"""
Recursivelly creates all the ancestor nodes of the child.
"""
#print 'parent,parent node id is %s, child node id is %s, root node id is %s'%(parentId,child.id,self.rootNode.id)
if not parentId:
# if this node has not parent, it will be appented to the root node
parentNode = self.rootNode
else:
try:
parentNode = self.rootNode.get_node_by_id(parentId)
except:
parentNode = None
#print 'parent(),parent node is ',parentNode
if parentNode:
parentNode.append(child)
else:
parentNode = self.make_node(parentId)
parentNode.append(child)
# recursive constructing this branch in the tree
self.parent( self.pidFn(parentNode.data), parentNode)
return
def flatten(self):
"""
return the flatten tree nodes
"""
return self.rootNode.flatten()