Fix mutable default values

bumble/device.py

@@ -1569,8 +1569,8 @@ class Connection(CompositeEventEmitter):
     gatt_client: gatt_client.Client
     pairing_peer_io_capability: Optional[int]
     pairing_peer_authentication_requirements: Optional[int]
-    cs_configs: dict[int, ChannelSoundingConfig] = {}  # Config ID to Configuration
+    cs_configs: dict[int, ChannelSoundingConfig]  # Config ID to Configuration
-    cs_procedures: dict[int, ChannelSoundingProcedure] = {}  # Config ID to Procedures
+    cs_procedures: dict[int, ChannelSoundingProcedure]  # Config ID to Procedures
 
     @composite_listener
     class Listener:
@@ -1637,6 +1637,8 @@ class Connection(CompositeEventEmitter):
         self.pairing_peer_io_capability = None
         self.pairing_peer_authentication_requirements = None
         self.peer_le_features = None
+        self.cs_configs = {}
+        self.cs_procedures = {}
 
     # [Classic only]
     @classmethod
@@ -2046,9 +2048,9 @@ class Device(CompositeEventEmitter):
     legacy_advertiser: Optional[LegacyAdvertiser]
     sco_links: Dict[int, ScoLink]
     cis_links: Dict[int, CisLink]
-    bigs = dict[int, Big]()
+    bigs: dict[int, Big]
-    bis_links = dict[int, BisLink]()
+    bis_links: dict[int, BisLink]
-    big_syncs = dict[int, BigSync]()
+    big_syncs: dict[int, BigSync]
     _pending_cis: Dict[int, tuple[int, int]]
     gatt_service: gatt_service.GenericAttributeProfileService | None = None
 
@@ -2141,6 +2143,9 @@ class Device(CompositeEventEmitter):
         self.sco_links = {}  # ScoLinks, by connection handle (BR/EDR only)
         self.cis_links = {}  # CisLinks, by connection handle (LE only)
         self._pending_cis = {}  # (CIS_ID, CIG_ID), by CIS_handle
+        self.bigs = {}
+        self.bis_links = {}
+        self.big_syncs = {}
         self.classic_enabled = False
         self.inquiry_response = None
         self.address_resolver = None

bumble/host.py

@@ -235,7 +235,7 @@ class Host(AbortableEventEmitter):
     cis_links: Dict[int, IsoLink]
     bis_links: Dict[int, IsoLink]
     sco_links: Dict[int, ScoLink]
-    bigs: dict[int, set[int]] = {}  # BIG Handle to BIS Handles
+    bigs: dict[int, set[int]]
     acl_packet_queue: Optional[DataPacketQueue] = None
     le_acl_packet_queue: Optional[DataPacketQueue] = None
     iso_packet_queue: Optional[DataPacketQueue] = None
@@ -259,6 +259,7 @@ class Host(AbortableEventEmitter):
         self.cis_links = {}  # CIS links, by connection handle
         self.bis_links = {}  # BIS links, by connection handle
         self.sco_links = {}  # SCO links, by connection handle
+        self.bigs = {}  # BIG Handle to BIS Handles
         self.pending_command = None
         self.pending_response: Optional[asyncio.Future[Any]] = None
         self.number_of_supported_advertising_sets = 0

bumble/profiles/ascs.py

@@ -301,7 +301,7 @@ class AseStateMachine(gatt.Characteristic):
     presentation_delay = 0
 
     # Additional parameters in ENABLING, STREAMING, DISABLING State
-    metadata = le_audio.Metadata()
+    metadata: le_audio.Metadata
 
     def __init__(
         self,
@@ -313,6 +313,7 @@ class AseStateMachine(gatt.Characteristic):
         self.ase_id = ase_id
         self._state = AseStateMachine.State.IDLE
         self.role = role
+        self.metadata = le_audio.Metadata()
 
         uuid = (
             gatt.GATT_SINK_ASE_CHARACTERISTIC