Assign sr86x submodules to static attributes

docs/changes/newsfragments/7542.improved_driver

@@ -0,0 +1,3 @@
+The Stanford SR86x drivers now statically assign attributes statically
+for more member InstrumentModules and parameters enabling better documentation,
+type checking and IDE integration.

src/qcodes/instrument_drivers/stanford_research/SR86x.py

@@ -8,6 +8,7 @@
 
 from qcodes.instrument import (
     ChannelList,
+    ChannelTuple,
     InstrumentBaseKWArgs,
     InstrumentChannel,
     VisaInstrument,
@@ -118,16 +119,14 @@ def __init__(
         # Maximum amount of kB that can be read per single CAPTUREGET command
         self.max_size_per_reading_in_kb = 64
 
-        self.capture_config: Parameter = (
-            self.add_parameter(  # Configure which parameters we want to capture
-                "capture_config",
-                label="capture configuration",
-                get_cmd="CAPTURECFG?",
-                set_cmd="CAPTURECFG {}",
-                val_mapping={"X": "0", "X,Y": "1", "R,T": "2", "X,Y,R,T": "3"},
-            )
+        self.capture_config: Parameter = self.add_parameter(
+            "capture_config",
+            label="capture configuration",
+            get_cmd="CAPTURECFG?",
+            set_cmd="CAPTURECFG {}",
+            val_mapping={"X": "0", "X,Y": "1", "R,T": "2", "X,Y,R,T": "3"},
         )
-        """Parameter capture_config"""
+        """Parameter capture_config configures which parameters we want to capture"""
 
         self.capture_rate_max: Parameter = self.add_parameter(
             "capture_rate_max",
@@ -150,12 +149,10 @@ def __init__(
         max_rate = self.capture_rate_max()
         self.available_frequencies = [max_rate / 2**i for i in range(20)]
 
-        self.capture_status: Parameter = (
-            self.add_parameter(  # Are we capturing at the moment?
-                "capture_status", label="capture status", get_cmd="CAPTURESTAT?"
-            )
+        self.capture_status: Parameter = self.add_parameter(
+            "capture_status", label="capture status", get_cmd="CAPTURESTAT?"
         )
-        """Parameter capture_status"""
+        """Parameter capture_status: Are we capturing at the moment?"""
 
         self.count_capture_bytes: Parameter = self.add_parameter(
             "count_capture_bytes",
@@ -187,8 +184,30 @@ def __init__(
         then the returned value is simply equal to the current capture length.
         """
 
-        for parameter_name in ["X", "Y", "R", "T"]:
-            self.add_parameter(parameter_name, parameter_class=SR86xBufferReadout)
+        self.X: SR86xBufferReadout = self.add_parameter(
+            "X", parameter_class=SR86xBufferReadout
+        )
+        """
+        X buffer readout.
+        """
+        self.Y: SR86xBufferReadout = self.add_parameter(
+            "Y", parameter_class=SR86xBufferReadout
+        )
+        """
+        Y buffer readout.
+        """
+        self.R: SR86xBufferReadout = self.add_parameter(
+            "R", parameter_class=SR86xBufferReadout
+        )
+        """
+        R buffer readout.
+        """
+        self.T: SR86xBufferReadout = self.add_parameter(
+            "T", parameter_class=SR86xBufferReadout
+        )
+        """
+        T buffer readout.
+        """
 
     def snapshot_base(
         self,
@@ -1046,6 +1065,7 @@ def __init__(
             "P", label="Phase", get_cmd="OUTP? 3", get_parser=float, unit="deg"
         )
         """Parameter P"""
+
         self.complex_voltage: Parameter = self.add_parameter(
             "complex_voltage",
             label="Voltage",
@@ -1146,7 +1166,10 @@ def __init__(
             data_channels.append(data_channel)
             self.add_submodule(ch_name, data_channel)
 
-        self.add_submodule("data_channels", data_channels.to_channel_tuple())
+        self.data_channels: ChannelTuple[SR86xDataChannel] = self.add_submodule(
+            "data_channels", data_channels.to_channel_tuple()
+        )
+        """Interface for the SR86x data channels"""
 
         # Interface
         self.add_function("reset", call_cmd="*RST")
@@ -1155,7 +1178,8 @@ def __init__(
         self.add_function("enable_front_panel", call_cmd="OVRM 1")
 
         buffer = SR86xBuffer(self, f"{self.name}_buffer")
-        self.add_submodule("buffer", buffer)
+        self.buffer: SR86xBuffer = self.add_submodule("buffer", buffer)
+        """Interface for the SR86x buffer"""
 
         self.input_config()
         self.connect_message()

src/qcodes/instrument_drivers/stanford_research/__init__.py

@@ -1,5 +1,5 @@
 from .SG384 import SG384
-from .SR86x import SR86x, SR86xBuffer
+from .SR86x import SR86x, SR86xBuffer, SR86xDataChannel
 from .SR560 import SR560
 from .SR830 import SR830
 from .SR860 import SR860
@@ -15,4 +15,5 @@
     "SR865A",
     "SR86x",
     "SR86xBuffer",
+    "SR86xDataChannel",
 ]