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Additional support for subclassing of 'treelib.Node' #157

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19 changes: 19 additions & 0 deletions tests/test_tree.py
Original file line number Diff line number Diff line change
Expand Up @@ -617,6 +617,25 @@ class SubTree(Tree):
node = tree.create_node()
self.assertTrue(isinstance(node, SubNode))

def test_subclassing_extra_kwargs(self):
class SubNode(Node):
def __init__(self, some_argument=None, **kwargs):
self.some_property = some_argument
super().__init__(**kwargs)

class SubTree(Tree):
node_class = SubNode

tree = SubTree()
node = tree.create_node(some_argument="some_value")
self.assertTrue(isinstance(node, SubNode))
self.assertEqual(node.some_property, "some_value")

tree = Tree(node_class=SubNode)
node = tree.create_node(some_argument="some_value")
self.assertTrue(isinstance(node, SubNode))
self.assertEqual(node.some_property, "some_value")

def test_shallow_copy_hermetic_pointers(self):
# tree 1
# Hárry
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4 changes: 2 additions & 2 deletions treelib/tree.py
Original file line number Diff line number Diff line change
Expand Up @@ -336,12 +336,12 @@ def contains(self, nid):
"""Check if the tree contains node of given id"""
return True if nid in self._nodes else False

def create_node(self, tag=None, identifier=None, parent=None, data=None):
def create_node(self, tag=None, identifier=None, parent=None, data=None, **kwargs):
"""
Create a child node for given @parent node. If ``identifier`` is absent,
a UUID will be generated automatically.
"""
node = self.node_class(tag=tag, identifier=identifier, data=data)
node = self.node_class(tag=tag, identifier=identifier, data=data, **kwargs)
self.add_node(node, parent)
return node

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