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Add typing annotations to Python codes. (#411)

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This commit is contained in:
Yudong Jin
2023-03-12 18:49:52 +08:00
committed by GitHub
parent 2029d2b939
commit 9151eaf533
50 changed files with 577 additions and 817 deletions
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20
codes/python/chapter_stack_and_queue/queue.py
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@ -4,9 +4,7 @@ Created Time: 2022-11-29
Author: Peng Chen (pengchzn@gmail.com)
"""
import os.path as osp
import sys
import sys, os.path as osp
sys.path.append(osp.dirname(osp.dirname(osp.abspath(__file__))))
from modules import *
@ -14,9 +12,9 @@ from modules import *
""" Driver Code """
if __name__ == "__main__":
""" 初始化队列 """
# 在 Python 中，我们一般将双向队列类 deque 看左队列使用
# 虽然 queue.Queue() 是纯正的队列类，但不太好用，因此不建议
que = collections.deque()
# 在 Python 中，我们一般将双向队列类 deque 看作队列使用
# 虽然 queue.Queue() 是纯正的队列类，但不太好用
que: Deque[int] = collections.deque()
""" 元素入队 """
que.append(1)
@ -27,18 +25,18 @@ if __name__ == "__main__":
print("队列 que =", que)
""" 访问队首元素 """
front = que[0];
print("队首元素 front =", front);
front: int = que[0]
print("队首元素 front =", front)
""" 元素出队 """
pop = que.popleft()
pop: int = que.popleft()
print("出队元素 pop =", pop)
print("出队后 que =", que)
""" 获取队列的长度 """
size = len(que)
size: int = len(que)
print("队列长度 size =", size)
""" 判断队列是否为空 """
is_empty = len(que) == 0
is_empty: bool = len(que) == 0
print("队列是否为空 =", is_empty)