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Generic type hint in DDL #12677

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Generic type hint in DDL #12677

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16 changes: 9 additions & 7 deletions data_structures/linked_list/doubly_linked_list_two.py
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Original file line number Diff line number Diff line change
Expand Up @@ -10,12 +10,14 @@
"""

from dataclasses import dataclass
from typing import Self
from typing import Self, TypeVar

Data = TypeVar("Data")


@dataclass
class Node:
data: int
class Node[Data]:
data: Data
previous: Self | None = None
next: Self | None = None

Expand Down Expand Up @@ -52,7 +54,7 @@ def __str__(self):
current = current.next
return " ".join(str(node) for node in nodes)

def __contains__(self, value: int):
def __contains__(self, value: Data):
current = self.head
while current:
if current.data == value:
Expand Down Expand Up @@ -87,7 +89,7 @@ def set_tail(self, node: Node) -> None:
else:
self.insert_after_node(self.tail, node)

def insert(self, value: int) -> None:
def insert(self, value: Data) -> None:
node = Node(value)
if self.head is None:
self.set_head(node)
Expand Down Expand Up @@ -116,7 +118,7 @@ def insert_after_node(self, node: Node, node_to_insert: Node) -> None:

node.next = node_to_insert

def insert_at_position(self, position: int, value: int) -> None:
def insert_at_position(self, position: int, value: Data) -> None:
current_position = 1
new_node = Node(value)
node = self.head
Expand All @@ -128,7 +130,7 @@ def insert_at_position(self, position: int, value: int) -> None:
node = node.next
self.set_tail(new_node)

def get_node(self, item: int) -> Node:
def get_node(self, item: Data) -> Node:
node = self.head
while node:
if node.data == item:
Expand Down