import signal
import sys
from dataclasses import dataclass, asdict
from datetime import datetime

def signal_handler(sig, frame):
    print(f"收到退出信号 sig={sig}，程序退出")
    sys.exit(0)

signal.signal(signal.SIGINT, signal_handler)  # 捕获 Ctrl+C 信号


if __name__ == '__main__':
    t=datetime.now().strftime("%Y-%m-%d %H:%M:%S.%f")[:-3]
    print(t)
    while True:
        # 程序主循环
        pass