Wrap fileno() method

Author: davidbrochart

src/zmq_anyio/_socket.py

@@ -194,6 +194,12 @@ def __init__(
         self._task_group = task_group
         self.__stack = None
 
+    def fileno(self) -> int:
+        try:
+            return super().fileno()
+        except zmq.error.ZMQError:
+            return -1
+
     def get(self, key):
         result = super().get(key)
         if key == EVENTS: