Format python codes with black. (#453)

codes/python/chapter_stack_and_queue/deque.py

@@ -8,35 +8,35 @@ from collections import deque
 
 """ Driver Code """
 if __name__ == "__main__":
-    """ 初始化双向队列 """
+    # 初始化双向队列
     deq: deque[int] = deque()
 
-    """ 元素入队 """
-    deq.append(2)      # 添加至队尾
+    # 元素入队
+    deq.append(2)  # 添加至队尾
     deq.append(5)
     deq.append(4)
     deq.appendleft(3)  # 添加至队首
     deq.appendleft(1)
     print("双向队列 deque =", deq)
 
-    """ 访问元素 """
+    # 访问元素
     front: int = deq[0]  # 队首元素
     print("队首元素 front =", front)
     rear: int = deq[-1]  # 队尾元素
     print("队尾元素 rear =", rear)
 
-    """ 元素出队 """
+    # 元素出队
     pop_front: int = deq.popleft()  # 队首元素出队
     print("队首出队元素  pop_front =", pop_front)
     print("队首出队后 deque =", deq)
-    pop_rear: int = deq.pop()       # 队尾元素出队
+    pop_rear: int = deq.pop()  # 队尾元素出队
     print("队尾出队元素  pop_rear =", pop_rear)
     print("队尾出队后 deque =", deq)
 
-    """ 获取双向队列的长度 """
+    # 获取双向队列的长度
     size: int = len(deq)
     print("双向队列长度 size =", size)
 
-    """ 判断双向队列是否为空 """
+    # 判断双向队列是否为空
     is_empty: bool = len(deq) == 0
     print("双向队列是否为空 =", is_empty)