add Bethany tool

Bethany/lib/timeout.py

@@ -0,0 +1,31 @@
+
+import signal
+
+# 定义超时异常
+class TimeoutException(Exception):
+    pass
+
+# 处理超时信号
+def handler(signum, frame):
+    raise TimeoutException()
+
+# 设置超时时间（秒）
+timeout = 30
+
+# 使用装饰器设置超时
+def timeout_decorator(func):
+    def wrapper(*args, **kwargs):
+        # 设置信号处理器
+        signal.signal(signal.SIGALRM, handler)
+        # 启动闹钟
+        signal.alarm(timeout)
+        try:
+            result = func(*args, **kwargs)
+        except TimeoutException:
+            print("Function timed out!")
+            result = None
+        finally:
+            # 关闭闹钟
+            signal.alarm(0)
+        return result
+    return wrapper