feat: 新增 timer.py 计时器程序

timer.py

@@ -0,0 +1,183 @@
+import time
+import threading
+import sys
+
+class Timer:
+    def __init__(self):
+        self.total_seconds = 0
+        self.remaining_seconds = 0
+        self.is_running = False
+        self.is_paused = False
+        self.thread = None
+
+    def set_timer(self, minutes, seconds):
+        """设置倒计时时间"""
+        self.total_seconds = minutes * 60 + seconds
+        self.remaining_seconds = self.total_seconds
+        print(f"计时器设置为 {minutes} 分 {seconds} 秒")
+
+    def start(self):
+        """开始倒计时"""
+        if self.total_seconds <= 0:
+            print("请先设置计时器时间！")
+            return
+
+        if self.is_running and not self.is_paused:
+            print("计时器已经在运行中！")
+            return
+
+        self.is_running = True
+        self.is_paused = False
+
+        if self.thread is None or not self.thread.is_alive():
+            self.thread = threading.Thread(target=self._countdown)
+            self.thread.daemon = True
+            self.thread.start()
+            print("计时器开始！")
+
+    def pause(self):
+        """暂停计时器"""
+        if not self.is_running:
+            print("计时器未运行！")
+            return
+
+        if self.is_paused:
+            print("计时器已经暂停！")
+            return
+
+        self.is_paused = True
+        print("计时器已暂停")
+
+    def resume(self):
+        """继续计时器"""
+        if not self.is_running:
+            print("计时器未运行！")
+            return
+
+        if not self.is_paused:
+            print("计时器未暂停！")
+            return
+
+        self.is_paused = False
+        print("计时器继续")
+
+    def reset(self):
+        """重置计时器"""
+        self.is_running = False
+        self.is_paused = False
+        self.remaining_seconds = self.total_seconds
+        print("计时器已重置")
+
+    def _countdown(self):
+        """倒计时线程函数"""
+        while self.remaining_seconds > 0 and self.is_running:
+            if not self.is_paused:
+                mins, secs = divmod(self.remaining_seconds, 60)
+                time_format = f"{mins:02d}:{secs:02d}"
+                sys.stdout.write(f"\r剩余时间: {time_format}")
+                sys.stdout.flush()
+                time.sleep(1)
+                self.remaining_seconds -= 1
+
+        if self.remaining_seconds <= 0 and self.is_running:
+            print("\n时间到！计时器结束！")
+            self.is_running = False
+        else:
+            print("\n计时器已停止")
+
+    def get_status(self):
+        """获取计时器状态"""
+        if self.is_running:
+            if self.is_paused:
+                status = "已暂停"
+            else:
+                status = "运行中"
+        else:
+            status = "未运行"
+
+        mins, secs = divmod(self.remaining_seconds, 60)
+        time_format = f"{mins:02d}:{secs:02d}"
+        return f"状态: {status}, 剩余时间: {time_format}"
+
+
+def main():
+    """主函数，提供命令行交互界面"""
+    timer = Timer()
+
+    print("=== Python 计时器 ===")
+    print("命令列表:")
+    print("  set <分钟> <秒> - 设置计时器时间")
+    print("  start           - 开始计时器")
+    print("  pause           - 暂停计时器")
+    print("  resume          - 继续计时器")
+    print("  reset           - 重置计时器")
+    print("  status          - 查看状态")
+    print("  help            - 显示帮助")
+    print("  quit            - 退出程序")
+    print()
+
+    while True:
+        try:
+            command = input(">>> ").strip().lower().split()
+
+            if not command:
+                continue
+
+            cmd = command[0]
+
+            if cmd == "set":
+                if len(command) != 3:
+                    print("用法: set <分钟> <秒>")
+                    continue
+                try:
+                    minutes = int(command[1])
+                    seconds = int(command[2])
+                    if minutes < 0 or seconds < 0:
+                        print("时间不能为负数！")
+                        continue
+                    timer.set_timer(minutes, seconds)
+                except ValueError:
+                    print("请输入有效的数字！")
+
+            elif cmd == "start":
+                timer.start()
+
+            elif cmd == "pause":
+                timer.pause()
+
+            elif cmd == "resume":
+                timer.resume()
+
+            elif cmd == "reset":
+                timer.reset()
+
+            elif cmd == "status":
+                print(timer.get_status())
+
+            elif cmd == "help":
+                print("命令列表:")
+                print("  set <分钟> <秒> - 设置计时器时间")
+                print("  start           - 开始计时器")
+                print("  pause           - 暂停计时器")
+                print("  resume          - 继续计时器")
+                print("  reset           - 重置计时器")
+                print("  status          - 查看状态")
+                print("  help            - 显示帮助")
+                print("  quit            - 退出程序")
+
+            elif cmd == "quit":
+                print("退出计时器程序")
+                break
+
+            else:
+                print(f"未知命令: {cmd}，输入 'help' 查看帮助")
+
+        except KeyboardInterrupt:
+            print("\n程序被中断")
+            break
+        except Exception as e:
+            print(f"发生错误: {e}")
+
+
+if __name__ == "__main__":
+    main()