Add AnalysisResult class

- AnalysisResultData class has been deprecated
- ExperimentData.load is updated to directly instantiate own class
- DbExperimentData._analysis_res_cls attribute is added to instantiate proper analysis container

AnalysisResult class implements _from_service_data method that implements
formatter for FitVal. UFloat value is converted into FitVal just before data saving
and converted back into UFloat in the loader. Covariance info will be lost in round trip.
FitVal is still supported as value container for UFloat in database service.
FakeService unittest class is also udpated to support storing the analysis results
and several unittests for AnalysisResult class are also added.

qiskit_experiments/curve_analysis/curve_analysis.py

@@ -43,7 +43,7 @@
 from qiskit_experiments.framework import (
     BaseAnalysis,
     ExperimentData,
-    AnalysisResultData,
+    AnalysisResult,
     Options,
 )
 
@@ -203,7 +203,7 @@ class AnalysisExample(CurveAnalysis):
 
         - Create extra data from fit result:
             Override :meth:`~self._extra_database_entry`. You need to return a list of
-            :class:`~qiskit_experiments.framework.analysis_result_data.AnalysisResultData`
+            :class:`~qiskit_experiments.framework.analysis_result_data.AnalysisResult`
             object. This returns an empty list by default.
 
         - Customize fit quality evaluation:
@@ -496,7 +496,7 @@ def _format_data(self, data: CurveData) -> CurveData:
         )
 
     # pylint: disable=unused-argument
-    def _extra_database_entry(self, fit_data: FitData) -> List[AnalysisResultData]:
+    def _extra_database_entry(self, fit_data: FitData) -> List[AnalysisResult]:
         """Calculate new quantity from the fit result.
 
         Subclasses can override this method to do post analysis.
@@ -746,7 +746,7 @@ def _data(
 
     def _run_analysis(
         self, experiment_data: ExperimentData
-    ) -> Tuple[List[AnalysisResultData], List["pyplot.Figure"]]:
+    ) -> Tuple[List[AnalysisResult], List["pyplot.Figure"]]:
         #
         # 1. Parse arguments
         #
@@ -868,7 +868,7 @@ def _run_analysis(
 
             # overview entry
             analysis_results.append(
-                AnalysisResultData(
+                AnalysisResult(
                     name=PARAMS_ENTRY_PREFIX + self.__class__.__name__,
                     value=[p.nominal_value for p in fit_result.popt],
                     chisq=fit_result.reduced_chisq,
@@ -895,7 +895,7 @@ def _run_analysis(
                         p_name = param_repr
                         p_repr = param_repr
                         unit = None
-                    result_entry = AnalysisResultData(
+                    result_entry = AnalysisResult(
                         name=p_repr,
                         value=fit_result.fitval(p_name),
                         unit=unit,
@@ -918,7 +918,7 @@ def _run_analysis(
                     "ydata": series_data.y,
                     "sigma": series_data.y_err,
                 }
-            raw_data_entry = AnalysisResultData(
+            raw_data_entry = AnalysisResult(
                 name=DATA_ENTRY_PREFIX + self.__class__.__name__,
                 value=raw_data_dict,
                 extra={

qiskit_experiments/curve_analysis/visualization/fit_result_plotters.py

@@ -30,7 +30,7 @@
 from qiskit.utils import detach_prefix
 
 from qiskit_experiments.curve_analysis.curve_data import SeriesDef, FitData, CurveData
-from qiskit_experiments.framework import AnalysisResultData
+from qiskit_experiments.framework import AnalysisResult
 from qiskit_experiments.framework.matplotlib import get_non_gui_ax
 from .curves import plot_scatter, plot_errorbar, plot_curve_fit
 from .style import PlotterStyle
@@ -47,7 +47,7 @@ def draw(
         fit_samples: List[CurveData],
         tick_labels: Dict[str, str],
         fit_data: FitData,
-        result_entries: List[AnalysisResultData],
+        result_entries: List[AnalysisResult],
         style: Optional[PlotterStyle] = None,
         axis: Optional["matplotlib.axes.Axes"] = None,
     ) -> "pyplot.Figure":
@@ -146,7 +146,7 @@ def draw(
         fit_samples: List[CurveData],
         tick_labels: Dict[str, str],
         fit_data: FitData,
-        result_entries: List[AnalysisResultData],
+        result_entries: List[AnalysisResult],
         style: Optional[PlotterStyle] = None,
         axis: Optional["matplotlib.axes.Axes"] = None,
     ) -> "pyplot.Figure":
@@ -336,7 +336,7 @@ def draw_single_curve_mpl(
         )
 
 
-def write_fit_report(result_entries: List[AnalysisResultData]) -> str:
+def write_fit_report(result_entries: List[AnalysisResult]) -> str:
     """A function that generates fit reports documentation from list of data.
 
     Args:

qiskit_experiments/database_service/db_analysis_result.py

@@ -203,7 +203,7 @@ def save(self) -> None:
 
     def copy(self) -> "DbAnalysisResultV1":
         """Return a copy of the result with a new result ID"""
-        return DbAnalysisResultV1(
+        return self.__class__(
             name=self.name,
             value=self.value,
             device_components=self.device_components,

qiskit_experiments/database_service/db_experiment_data.py

@@ -128,6 +128,7 @@ class DbExperimentDataV1(DbExperimentData):
     verbose = True  # Whether to print messages to the standard output.
     _metadata_version = 1
     _job_executor = futures.ThreadPoolExecutor()
+    _analysis_res_cls = DbAnalysisResult
 
     _json_encoder = ExperimentEncoder
     _json_decoder = ExperimentDecoder
@@ -812,7 +813,7 @@ def _retrieve_analysis_results(self, refresh: bool = False):
             )
             for result in retrieved_results:
                 result_id = result["result_id"]
-                self._analysis_results[result_id] = DbAnalysisResult._from_service_data(result)
+                self._analysis_results[result_id] = self._analysis_res_cls._from_service_data(result)
 
     def analysis_results(
         self,
@@ -1008,18 +1009,15 @@ def load(cls, experiment_id: str, service: DatabaseServiceV1) -> "DbExperimentDa
         service_data = service.experiment(experiment_id, json_decoder=cls._json_decoder)
 
         # Parse serialized metadata
-        metadata = service_data.pop("metadata")
-
-        # Initialize container
-        expdata = DbExperimentDataV1(
+        expdata = cls(
             experiment_type=service_data.pop("experiment_type"),
             backend=service_data.pop("backend"),
             experiment_id=service_data.pop("experiment_id"),
             parent_id=service_data.pop("parent_id", None),
             tags=service_data.pop("tags"),
             job_ids=service_data.pop("job_ids"),
             share_level=service_data.pop("share_level"),
-            metadata=metadata,
+            metadata=service_data.pop("metadata"),
             figure_names=service_data.pop("figure_names"),
             notes=service_data.pop("notes"),
             **service_data,

qiskit_experiments/database_service/db_fitval.py

@@ -13,7 +13,6 @@
 """DB class for fit value with std error and unit."""
 
 import dataclasses
-import warnings
 from typing import Optional
 
 
@@ -34,11 +33,3 @@ def __str__(self):
         if self.unit is not None:
             out += f" {str(self.unit)}"
         return out
-
-
-def __new__(cls, *args, **kwargs):
-    warnings.warn(
-        "FitVal object has been deprecated in Qiskit Experiments version 0.3 and "
-        "will be removed in version 0.5. Use version <= 0.3 to load this object.",
-        DeprecationWarning,
-    )

qiskit_experiments/database_service/device_component.py

@@ -12,6 +12,7 @@
 
 """Device component classes."""
 
+from typing import Dict, Any
 from abc import ABC, abstractmethod
 
 
@@ -35,6 +36,15 @@ def __init__(self, index: int):
     def __str__(self):
         return f"Q{self._index}"
 
+    def __json_encode__(self):
+        """Convert to format that can be JSON serialized."""
+        return {"index": self._index}
+
+    @classmethod
+    def __json_decode__(cls, value: Dict[str, Any]) -> "Qubit":
+        """Load from JSON compatible format."""
+        return cls(**value)
+
 
 class Resonator(DeviceComponent):
     """Class representing a resonator device component."""
@@ -45,6 +55,15 @@ def __init__(self, index: int):
     def __str__(self):
         return f"R{self._index}"
 
+    def __json_encode__(self):
+        """Convert to format that can be JSON serialized."""
+        return {"index": self._index}
+
+    @classmethod
+    def __json_decode__(cls, value: Dict[str, Any]) -> "Resonator":
+        """Load from JSON compatible format."""
+        return cls(**value)
+
 
 class UnknownComponent(DeviceComponent):
     """Class representing unknown device component."""
@@ -55,6 +74,15 @@ def __init__(self, component: str):
     def __str__(self):
         return self._component
 
+    def __json_encode__(self):
+        """Convert to format that can be JSON serialized."""
+        return {"component": self._component}
+
+    @classmethod
+    def __json_decode__(cls, value: Dict[str, Any]) -> "UnknownComponent":
+        """Load from JSON compatible format."""
+        return cls(**value)
+
 
 def to_component(string: str) -> DeviceComponent:
     """Convert the input string to a ``DeviceComponent`` instance.

qiskit_experiments/framework/__init__.py

@@ -187,7 +187,7 @@
 
 The :meth:`BaseAnalysis._run_analysis` method should return a pair
 ``(results, figures)`` where ``results`` is a list of
-:class:`AnalysisResultData` and ``figures`` is a list of
+:class:`AnalysisResult` and ``figures`` is a list of
 :class:`matplotlib.figure.Figure`.
 
 The :mod:`qiskit_experiments.data_processing` module contains classes for
@@ -207,6 +207,7 @@
     JobStatus
     AnalysisStatus
     FitVal
+    AnalysisResult
     AnalysisResultData
     ExperimentConfig
     AnalysisConfig
@@ -246,7 +247,7 @@
 from .base_analysis import BaseAnalysis
 from .base_experiment import BaseExperiment
 from .configs import ExperimentConfig, AnalysisConfig
-from .analysis_result_data import AnalysisResultData
+from .analysis_result_data import AnalysisResultData, AnalysisResult
 from .experiment_data import ExperimentData
 from .composite import (
     ParallelExperiment,