3.4.4

Automatically generated by python-semantic-release

CHANGELOG.md

@@ -1,6 +1,23 @@
 # CHANGELOG
 
 
+## v3.4.4 (2026-04-14)
+
+### Bug Fixes
+
+- Check duplicate stream sub
+  ([`c7de320`](https://github.com/bec-project/bec_widgets/commit/c7de320ca564264a31b84931f553170f25659685))
+
+- Check for duplicate subscriptions in GUIClient
+  ([`37747ba`](https://github.com/bec-project/bec_widgets/commit/37747babda407040333c6bd04646be9a49e0ee81))
+
+- Make gui client registry callback non static
+  ([`32f5d48`](https://github.com/bec-project/bec_widgets/commit/32f5d486d3fc8d41df2668c58932ae982819b285))
+
+- Remove staticmethod subscription
+  ([`0ff1fdc`](https://github.com/bec-project/bec_widgets/commit/0ff1fdc81578eec3ffc5d4030fca7b357a0b4c2f))
+
+
 ## v3.4.3 (2026-04-13)
 
 ### Bug Fixes

bec_widgets/cli/client_utils.py

@@ -10,9 +10,9 @@ import threading
 import time
 from contextlib import contextmanager
 from threading import Lock
-from typing import TYPE_CHECKING, Literal, TypeAlias, cast
+from typing import TYPE_CHECKING, Callable, Literal, TypeAlias, cast
 
-from bec_lib.endpoints import MessageEndpoints
+from bec_lib.endpoints import EndpointInfo, MessageEndpoints
 from bec_lib.logger import bec_logger
 from bec_lib.utils.import_utils import lazy_import, lazy_import_from
 from rich.console import Console
@@ -232,6 +232,11 @@ class BECGuiClient(RPCBase):
         """The launcher object."""
         return RPCBase(gui_id=f"{self._gui_id}:launcher", parent=self, object_name="launcher")
 
+    def _safe_register_stream(self, endpoint: EndpointInfo, cb: Callable, **kwargs):
+        """Check if already registered for registration in idempotent functions."""
+        if not self._client.connector.any_stream_is_registered(endpoint, cb=cb):
+            self._client.connector.register(endpoint, cb=cb, **kwargs)
+
     def connect_to_gui_server(self, gui_id: str) -> None:
         """Connect to a GUI server"""
         # Unregister the old callback
@@ -247,10 +252,9 @@ class BECGuiClient(RPCBase):
         self._ipython_registry = {}
 
         # Register the new callback
-        self._client.connector.register(
+        self._safe_register_stream(
             MessageEndpoints.gui_registry_state(self._gui_id),
             cb=self._handle_registry_update,
-            parent=self,
             from_start=True,
         )
 
@@ -531,20 +535,14 @@ class BECGuiClient(RPCBase):
 
     def _start(self, wait: bool = False) -> None:
         self._killed = False
-        self._client.connector.register(
-            MessageEndpoints.gui_registry_state(self._gui_id),
-            cb=self._handle_registry_update,
-            parent=self,
+        self._safe_register_stream(
+            MessageEndpoints.gui_registry_state(self._gui_id), cb=self._handle_registry_update
         )
         return self._start_server(wait=wait)
 
-    @staticmethod
-    def _handle_registry_update(
-        msg: dict[str, GUIRegistryStateMessage], parent: BECGuiClient
-    ) -> None:
+    def _handle_registry_update(self, msg: dict[str, GUIRegistryStateMessage]) -> None:
         # This was causing a deadlock during shutdown, not sure why.
         # with self._lock:
-        self = parent
         self._server_registry = cast(dict[str, RegistryState], msg["data"].state)
         self._update_dynamic_namespace(self._server_registry)
 

bec_widgets/cli/rpc/rpc_base.py

@@ -248,9 +248,7 @@ class RPCBase:
             self._rpc_response = None
             self._msg_wait_event.clear()
             self._client.connector.register(
-                MessageEndpoints.gui_instruction_response(request_id),
-                cb=self._on_rpc_response,
-                parent=self,
+                MessageEndpoints.gui_instruction_response(request_id), cb=self._on_rpc_response
             )
 
         self._client.connector.set_and_publish(MessageEndpoints.gui_instructions(receiver), rpc_msg)
@@ -276,11 +274,10 @@ class RPCBase:
             self._rpc_response = None
             return self._create_widget_from_msg_result(msg_result)
 
-    @staticmethod
-    def _on_rpc_response(msg_obj: MessageObject, parent: RPCBase) -> None:
+    def _on_rpc_response(self, msg_obj: MessageObject) -> None:
         msg = cast(messages.RequestResponseMessage, msg_obj.value)
-        parent._rpc_response = msg
-        parent._msg_wait_event.set()
+        self._rpc_response = msg
+        self._msg_wait_event.set()
 
     def _create_widget_from_msg_result(self, msg_result):
         if msg_result is None:

bec_widgets/utils/bec_dispatcher.py

@@ -175,12 +175,15 @@ class BECDispatcher:
             cb_info (dict | None): A dictionary containing information about the callback. Defaults to None.
         """
         qt_slot = QtThreadSafeCallback(cb=slot, cb_info=cb_info)
-        if qt_slot not in self._registered_slots:
-            self._registered_slots[qt_slot] = qt_slot
-        qt_slot = self._registered_slots[qt_slot]
-        self.client.connector.register(topics, cb=qt_slot, **kwargs)
-        topics_str, _ = self.client.connector._convert_endpointinfo(topics)
-        qt_slot.topics.update(set(topics_str))
+        if not self.client.connector.any_stream_is_registered(topics, qt_slot):
+            if qt_slot not in self._registered_slots:
+                self._registered_slots[qt_slot] = qt_slot
+            qt_slot = self._registered_slots[qt_slot]
+            self.client.connector.register(topics, cb=qt_slot, **kwargs)
+            topics_str, _ = self.client.connector._convert_endpointinfo(topics)
+            qt_slot.topics.update(set(topics_str))
+        else:
+            logger.warning(f"Attempted to create duplicate stream subscription for {topics=}")
 
     def disconnect_slot(
         self, slot: Callable, topics: EndpointInfo | str | list[EndpointInfo] | list[str]

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "bec_widgets"
-version = "3.4.3"
+version = "3.4.4"
 description = "BEC Widgets"
 requires-python = ">=3.11"
 classifiers = [

tests/end-2-end/test_bec_dock_rpc_e2e.py

@@ -1,6 +1,7 @@
 import pytest
 
 from bec_widgets.cli.client import Image, MotorMap, Waveform
+from bec_widgets.cli.client_utils import BECGuiClient
 from bec_widgets.cli.rpc.rpc_base import RPCReference
 
 # pylint: disable=unused-argument
@@ -122,7 +123,7 @@ def test_ring_bar(qtbot, connected_client_gui_obj):
     assert gui._ipython_registry[bar._gui_id].__class__.__name__ == "RingProgressBar"
 
 
-def test_rpc_gui_obj(connected_client_gui_obj, qtbot):
+def test_rpc_gui_obj(connected_client_gui_obj: BECGuiClient, qtbot):
     gui = connected_client_gui_obj
 
     qtbot.waitUntil(lambda: len(gui.windows) == 1, timeout=3000)