Python nested TypedDict example for discuss.python.org

corrected_implementation.py

from typing_extensions import TypedDict
from typing import Optional

class NodeDict(TypedDict):
    id: str
    value: int
    parent: Optional['NodeDict'] # No error anymore

parent_node = NodeDict(
    id='parent_node_id',
    value=1,
    parent=None
)

child_node = NodeDict(
    id='child_node_id', 
    value=0, 
    parent=parent_node
    )

example.py

from typing import TypedDict

NodeDict = TypedDict('NodeDict', {
    'id': str,
    'value': int,
    'parent': None | 'NodeDict' # Error occurs here
})

new_node = NodeDict(
    id='my_id', 
    value=0, 
    parent=None
    )

Python Discuss topic regarding this snippet

The solution was found by me during the discussion