Merge #3623

3623: Add two more methods to dataset protocol r=jenshnielsen a=jenshnielsen

Research shows that these are fairly commonly uses so to make it easier to use the protocol I suggest adding them here. The implementation is also fairly straight forward


Co-authored-by: Jens H. Nielsen <Jens.Nielsen@microsoft.com>

qcodes/dataset/data_set.py

@@ -437,13 +437,6 @@ def paramspecs(self) -> Dict[str, ParamSpec]:
         return {ps.name: ps
                 for ps in self.get_parameters()}
 
-    @property
-    def dependent_parameters(self) -> Tuple[ParamSpecBase, ...]:
-        """
-        Return all the parameters that explicitly depend on other parameters
-        """
-        return tuple(self._rundescriber.interdeps.dependencies.keys())
-
     @property
     def exp_id(self) -> int:
         exp_id = select_one_where(self.conn, "runs", "exp_id", "run_id", self.run_id)

qcodes/dataset/data_set_in_memory.py

@@ -11,7 +11,12 @@
 
 import numpy as np
 
-from qcodes.dataset.data_set_protocol import SPECS, BaseDataSet, CompletedError
+from qcodes.dataset.data_set_protocol import (
+    SPECS,
+    BaseDataSet,
+    CompletedError,
+    ParameterData,
+)
 from qcodes.dataset.descriptions.dependencies import InterDependencies_
 from qcodes.dataset.descriptions.param_spec import ParamSpec, ParamSpecBase
 from qcodes.dataset.descriptions.rundescriber import RunDescriber
@@ -825,6 +830,15 @@ def to_pandas_dataframe(
         self._warn_if_set(*params, start=start, end=end)
         return self.cache.to_pandas_dataframe()
 
+    def get_parameter_data(
+        self,
+        *params: Union[str, ParamSpec, _BaseParameter],
+        start: Optional[int] = None,
+        end: Optional[int] = None,
+    ) -> ParameterData:
+        self._warn_if_set(*params, start=start, end=end)
+        return self.cache.data()
+
     @staticmethod
     def _warn_if_set(
         *params: Union[str, ParamSpec, _BaseParameter],

qcodes/dataset/data_set_protocol.py

@@ -219,10 +219,22 @@ def export_info(self) -> ExportInfo:
     def cache(self) -> DataSetCache[DataSetProtocol]:
         pass
 
+    def get_parameter_data(
+        self,
+        *params: Union[str, ParamSpec, _BaseParameter],
+        start: Optional[int] = None,
+        end: Optional[int] = None,
+    ) -> ParameterData:
+        pass
+
     def get_parameters(self) -> SPECS:
         # used by plottr
         pass
 
+    @property
+    def dependent_parameters(self) -> Tuple[ParamSpecBase, ...]:
+        pass
+
     # exporters to other in memory formats
 
     def to_xarray_dataarray_dict(
@@ -501,6 +513,13 @@ def completed_timestamp(self, fmt: str = "%Y-%m-%d %H:%M:%S") -> Optional[str]:
         """
         return raw_time_to_str_time(self.completed_timestamp_raw, fmt)
 
+    @property
+    def dependent_parameters(self) -> Tuple[ParamSpecBase, ...]:
+        """
+        Return all the parameters that explicitly depend on other parameters
+        """
+        return tuple(self.description.interdeps.dependencies.keys())
+
 
 class DataSetType(str, Enum):