treelib | efficient implementation of tree data structure | Dataset library
kandi X-RAY | treelib Summary
kandi X-RAY | treelib Summary
Tree implementation in python: simple for you to use.
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Top functions reviewed by kandi - BETA
- Do the crawler
- Update the successors of a node
- Return the parent id of the given tree
- Return a unique note id
- Calculate the CRC of a string
- Return the successors of the given tree
- Print node information
- Set the predecessor of a node nid
- Recursively build tree
- Create a family tree
- Returns the bpointer of the predecessor
- Return the fpointer of the tree
- Set the successors of the tree
- The identifier for this request
- Set unique identifier
- Example example
treelib Key Features
treelib Examples and Code Snippets
class MyNode(object):
def __init__(self, id, label):
self.id = id
self.label = label
from treelib import Tree
tree = Tree()
def add_node(id, label, parent=None):
node = MyNode(id, label)
tree.create_node(tag=
l = [
{"node": "root", "children": ["a"]},
{"node": "a", "children": ["b", "b"]},
{"node": "b", "children": ["c", "c", "c"]},
{"node": "c", "children": ["d"]},
]
compressed = {e["node"]: e["children
import treelib, itertools as it, collections as ct
lst = [1,['a','b','c','d',['s','t',['ab','cd',['a','b'],'ef'],'u'],'f']]
tree = treelib.Tree()
c = ct.defaultdict(lambda :it.count(1))
def build_tree(d, t, p = None):
last_p = None
from treelib import Node, Tree
lst = ["S", ["NP", ["DT", "the"], ["NN", "dog"]], ["VP", ["Vt", "saw"], ["NP", ["NP", ["DT", "the"], ["NN", "man"]],
["PP", ["P", "with"],
# the working dataset
df2 = df.iloc[:, :4].reset_index(drop=True) # make a copy
df2.columns = range(4) # rename columns to (0,1,2,3) for convenience
# output container
arr = np.zeros(df2.shape, dtype=int)
# state variable: level of th
comp_graph_components = [complement.subgraph(c).copy() for c in nx.connected_components(complement)]
for subgraph in comp_graph_components:
generate_cotree(subgraph,tree_pointer=tree_ptr)
from treelib import Node, Tree
my_dict = {'S': {1: 'AbB', 2: 'bbS'}, 'AbB': {1: 'bAbbB', 2: 'abB'}, 'bAbbB': {}, 'abB': {1: 'abAaA', 2: 'abbBB', 3: 'abb'}, 'abAaA': {}, 'abbBB': {}, 'abb': {}, 'bbS': {}}
def add_children(data, tree, nod
from treelib import Tree
def extract_regions(image):
"""
Extracts 8-neighbors-connected regions from a binary image.
:param image: A homogeneous list of lists containing binary values (booleans or 1s and 0s).
:return: A list of trees cont
def getDescendants(curr, par, level):
res = [[curr, par, level]]
children = df.query('Parent == @curr')
for n in children.Child:
if n != par:
deeper = getDescendants(n, curr, level + 1)
if len(de
Community Discussions
Trending Discussions on treelib
QUESTION
I created some nodes by a Node-class and added them to a tree using Treelib.
...ANSWER
Answered 2021-Dec-21 at 16:30First some remarks:
- I would use a different name for the class
Node
; as also TreeLib defines aNode
class. - As you use TreeLib there should not be a need to maintain parent-references in your own class instances. This is something that TreeLib manages for you already.
You can iterate over the nodes with the all_nodes_itr
method, which will give you a TreeLib Node
instance in each iteration. You can then access TreeLib attributes such as identifier
or parent
. For your own attributes, access the data
attribute, and then the attribute you want to see (like label
)
Here is a simplified script:
QUESTION
I have this list of dicts:
...ANSWER
Answered 2021-Jul-11 at 22:07First, I would convert this:
QUESTION
I'm trying to convert a nested list into a Treelib representation.
The desired structure of the tree is such that all elements within a list that are not of the type list
are at the same hierarchy. A sub-list in the nested list is the child of the element (this has to be an element which is not of type list
) immediately preceding it. For instance,
ANSWER
Answered 2021-Jul-11 at 22:04You can recursively traverse your list, keeping track of the parent:
QUESTION
how are you guys?
I'm having doubts with a python library, called treelib. I noticed that when using the 'tree.show ()' function it returns the tree with the children sorted in alphabetical order and this raised the question of how the insertion in this library works. I went to their source code, but as I'm starting in python I didn't understand how the insertion of the node in the tree worked ... So, someone who uses this library knows how to inform me if in an insert like the one below:
ANSWER
Answered 2020-Nov-07 at 21:46According to the documentation, your tree should look like this:
QUESTION
At pg.7 on >this article< there is a recursive algorithm that explains the generation of a co-tree given the co-graph. Based on this article I am trying to implement it in python3 using the library NetworkX for the graph structures and the library treelib for the tree data structure.
In order to be precise, I have created exactly the same graph of the example (once again at pg.7 of the aforementioned article) and I have written the following function:
...ANSWER
Answered 2020-Aug-27 at 10:33So, I figured it out. (Ι think ^^)
When the code below gets executed:
QUESTION
I have a python dictionary and I would like to create a tree from it. I`m using the treelib library to print it. The dictionary looks something like this:
...ANSWER
Answered 2020-May-27 at 00:49There are two problems inherent to your data structure:
What if two children have the same label? I.e. what if the root has children 'A' and 'B', but both 'A' and 'B' have a child called 'a'? We can only assume that never happens, but in realistic trees (for instance a file system) it's common (i.e. two folders can both have sub-folders with the same name, but different contents)
What if a loop is introduced, like
{'S': {'a'}, 'a': {'b'}, 'b': {'a'}}
I'm going to assume your tree has neither loops nor duplicates, but that's quite an assumption.
Since your data structure has no way of telling on what level its values are, the best way to go about this would be: whenever you add a node, first check if it has children and add them, before moving on to the siblings:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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Install treelib
You can use treelib like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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