added :LABEL to fields from metadata

src/fastcs_pandablocks/panda/controller.py

@@ -59,16 +59,23 @@ def __init__(self, hostname: str, poll_period: float) -> None:
         self._raw_panda = RawPanda(hostname)
         self._blocks: dict[PandaName, FieldController] = {}
 
+        self.connected = False
+
         super().__init__()
 
     @property
     def additional_attributes(self):
         return self._additional_attributes
 
     async def connect(self) -> None:
+        if self.connected:
+            # `connect` needs to be called in `initialise`,
+            # then FastCS will attempt to call it again.
+            return
         await self._raw_panda.connect()
         blocks, fields, labels, initial_values = await self._raw_panda.introspect()
         self._blocks = _parse_introspected_data(blocks, fields, labels, initial_values)
+        self.connected = True
 
     async def initialise(self) -> None:
         await self.connect()
@@ -109,6 +116,7 @@ async def update_field_value(self, panda_name: PandaName, value: str):
 
     @scan(0.1)
     async def update(self):
+        raise RuntimeError("FINALLY CALLED!")
         changes = await self._raw_panda.get_changes()
         await asyncio.gather(
             *[

src/fastcs_pandablocks/panda/fields.py

@@ -56,6 +56,13 @@ def __init__(
 
         self._additional_attributes: dict[str, Attribute] = {}
 
+        if label is not None:
+            self._additional_attributes["label"] = AttrR(
+                String(),
+                description="Label from metadata.",
+                initial_value=label,
+            )
+
         super().__init__(search_device_for_attributes=False)
 
     def make_sub_fields(
@@ -641,7 +648,7 @@ def __init__(
         super().__init__(panda_name)
 
         # We use a raw string for this since many labels won't fit into
-        # mbbIn fields because of EPICS limitations.
+        # `mbbIn` fields because of EPICS limitations.
         # Since this is read only it doesn't matter.
         self.top_level_attribute = AttrR(
             String(),