RecursionError with custom objects

[chasel2361]

I' not sure is this a bug or not. Maybe someone can give me some hint to fix this problem.

Describe the bug I have a custom Node object with the following structure:

class Node():
    def __init__(self, row, level):
        
        self.level = level
        self.DESC = row['Description']
        self.id = {
            'HP': row[col_by_level[level][0]], 
            'IEC': row[col_by_level[level][1]],
        }
        self.Quantity = row['Quantity']
        self.children = []
        self.parent = None
        self.classification = None
    
    def __repr__(self):
        return f'{self.__class__.__name__} {self.id}: {self.DESC}'
    def add_child(self, node):
        node.set_parent(self)
        self.children.append(node)
    def set_parent(self, node):
        self.parent = node

When I compare these two objects, it enters an infinite loop with specific data content.

To Reproduce I have already used pickle to save the data that will cause errors as an attachment. Node.zip

with open('N344.pickle', 'rb') as f:
    n_old344, n_new344 = pickle.load(f)
with open('N437.pickle', 'rb') as f:
    n_old437, n_new437 = pickle.load(f)

DeepDiff(n_old344, n_new344, ignore_order=True)

Buggy Output RecursionError: maximum recursion depth exceeded the infinite loop is in Node.children

Expected behavior

{'values_changed': {'root.Quantity': {'new_value': nan, 'old_value': nan},
  "root.children[4].children[0].id['HP']": {'new_value': 'L48869-AE2',
   'old_value': 'L48869-372'},
  "root.children[4].children[0].id['IEC']": {'new_value': '6061B1252520',
   'old_value': '6061B1252515'},
  "root.children[4].children[0].children[0].id['HP']": {'new_value': 'L48870-AE2',
   'old_value': 'L48870-372'},
  "root.children[4].children[0].children[0].id['IEC']": {'new_value': 'L48870-AE2',
   'old_value': 'L48870-372'}}}

OS, DeepDiff version and Python version (please complete the following information):

• OS: Windows
• Version 10
• Python Version 3.11.3
• DeepDiff Version 6.3.0

Additional context

[seperman]

oops. I see you have already opened a ticket for it.

[seperman]

@chasel2361 Thanks for posting reproducible code. Is it possible to give me the smallest amount of data that causes the issue? That way I can add it as a unit test to make sure the issue is resolved once and for all.