Flake8: Drop ignore of issue A003 (#7949)

* Flake8: Drop ignore of issue A003

* updating DIRECTORY.md

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>

data_structures/binary_tree/fenwick_tree.py

@@ -46,7 +46,7 @@ class FenwickTree:
         self.size = len(arr)
         self.tree = deepcopy(arr)
         for i in range(1, self.size):
-            j = self.next(i)
+            j = self.next_(i)
             if j < self.size:
                 self.tree[j] += self.tree[i]
 
@@ -64,13 +64,13 @@ class FenwickTree:
         """
         arr = self.tree[:]
         for i in range(self.size - 1, 0, -1):
-            j = self.next(i)
+            j = self.next_(i)
             if j < self.size:
                 arr[j] -= arr[i]
         return arr
 
     @staticmethod
-    def next(index: int) -> int:
+    def next_(index: int) -> int:
         return index + (index & (-index))
 
     @staticmethod
@@ -102,7 +102,7 @@ class FenwickTree:
             return
         while index < self.size:
             self.tree[index] += value
-            index = self.next(index)
+            index = self.next_(index)
 
     def update(self, index: int, value: int) -> None:
         """

data_structures/heap/heap.py

@@ -88,13 +88,6 @@ class Heap:
             for i in range(self.heap_size // 2 - 1, -1, -1):
                 self.max_heapify(i)
 
-    def max(self) -> float:
-        """return the max in the heap"""
-        if self.heap_size >= 1:
-            return self.h[0]
-        else:
-            raise Exception("Empty heap")
-
     def extract_max(self) -> float:
         """get and remove max from heap"""
         if self.heap_size >= 2:

data_structures/linked_list/merge_two_lists.py

@@ -13,7 +13,7 @@ test_data_even = (4, 6, 2, 0, 8, 10, 3, -2)
 @dataclass
 class Node:
     data: int
-    next: Node | None
+    next_node: Node | None
 
 
 class SortedLinkedList:
@@ -32,7 +32,7 @@ class SortedLinkedList:
         node = self.head
         while node:
             yield node.data
-            node = node.next
+            node = node.next_node
 
     def __len__(self) -> int:
         """

data_structures/queue/double_ended_queue.py

@@ -42,8 +42,8 @@ class Deque:
         """
 
         val: Any = None
-        next: Deque._Node | None = None
-        prev: Deque._Node | None = None
+        next_node: Deque._Node | None = None
+        prev_node: Deque._Node | None = None
 
     class _Iterator:
         """
@@ -81,7 +81,7 @@ class Deque:
                 # finished iterating
                 raise StopIteration
             val = self._cur.val
-            self._cur = self._cur.next
+            self._cur = self._cur.next_node
 
             return val
 
@@ -128,8 +128,8 @@ class Deque:
             self._len = 1
         else:
             # connect nodes
-            self._back.next = node
-            node.prev = self._back
+            self._back.next_node = node
+            node.prev_node = self._back
             self._back = node  # assign new back to the new node
 
             self._len += 1
@@ -170,8 +170,8 @@ class Deque:
             self._len = 1
         else:
             # connect nodes
-            node.next = self._front
-            self._front.prev = node
+            node.next_node = self._front
+            self._front.prev_node = node
             self._front = node  # assign new front to the new node
 
             self._len += 1
@@ -264,10 +264,9 @@ class Deque:
         assert not self.is_empty(), "Deque is empty."
 
         topop = self._back
-        self._back = self._back.prev  # set new back
-        self._back.next = (
-            None  # drop the last node - python will deallocate memory automatically
-        )
+        self._back = self._back.prev_node  # set new back
+        # drop the last node - python will deallocate memory automatically
+        self._back.next_node = None
 
         self._len -= 1
 
@@ -300,8 +299,8 @@ class Deque:
         assert not self.is_empty(), "Deque is empty."
 
         topop = self._front
-        self._front = self._front.next  # set new front and drop the first node
-        self._front.prev = None
+        self._front = self._front.next_node  # set new front and drop the first node
+        self._front.prev_node = None
 
         self._len -= 1
 
@@ -385,8 +384,8 @@ class Deque:
             # compare every value
             if me.val != oth.val:
                 return False
-            me = me.next
-            oth = oth.next
+            me = me.next_node
+            oth = oth.next_node
 
         return True
 
@@ -424,7 +423,7 @@ class Deque:
         while aux is not None:
             # append the values in a list to display
             values_list.append(aux.val)
-            aux = aux.next
+            aux = aux.next_node
 
         return "[" + ", ".join(repr(val) for val in values_list) + "]"