build

docs/chapter_stack_and_queue/deque.md

@@ -462,7 +462,7 @@ comments: true
 
         def is_empty(self) -> bool:
             """判断双向队列是否为空"""
-            return self.size() == 0
+            return self._size == 0
 
         def push(self, num: int, is_front: bool):
             """入队操作"""

docs/chapter_stack_and_queue/queue.md

@@ -416,7 +416,7 @@ comments: true
 
         def is_empty(self) -> bool:
             """判断队列是否为空"""
-            return not self._front
+            return self._size == 0
 
         def push(self, num: int):
             """入队"""

docs/chapter_stack_and_queue/stack.md

@@ -412,7 +412,7 @@ comments: true
 
         def is_empty(self) -> bool:
             """判断栈是否为空"""
-            return not self._peek
+            return self._size == 0
 
         def push(self, val: int):
             """入栈"""
@@ -1284,7 +1284,7 @@ comments: true
 
         def is_empty(self) -> bool:
             """判断栈是否为空"""
-            return self._stack == []
+            return self._size == 0
 
         def push(self, item: int):
             """入栈"""