Add get_parameter_info to BaseModel (#423)

* Add get_parameter_info with test

* Add print_info option and test

* Test one without built pybamm model

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## Features
 
+- [#418](https://github.com/pybop-team/PyBOP/issues/418) - Wraps the `get_parameter_info` method from PyBaMM to get a dictionary of parameter names and types.
 - [#413](https://github.com/pybop-team/PyBOP/pull/413) - Adds `DesignCost` functionality to `WeightedCost` class with additional tests.
 - [#357](https://github.com/pybop-team/PyBOP/pull/357) - Adds `Transformation()` class with `LogTransformation()`, `IdentityTransformation()`, and `ScaledTransformation()`, `ComposedTransformation()` implementations with corresponding examples and tests.
 - [#427](https://github.com/pybop-team/PyBOP/issues/427) - Adds the nbstripout pre-commit hook to remove unnecessary metadata from notebooks.

pybop/models/base_model.py

@@ -718,3 +718,23 @@ def solver(self):
     @solver.setter
     def solver(self, solver):
         self._solver = solver.copy() if solver is not None else None
+
+    def get_parameter_info(self, print_info: bool = False):
+        """
+        Extracts the parameter names and types and returns them as a dictionary.
+        """
+        if not self.pybamm_model._built:
+            self.pybamm_model.build_model()
+
+        info = self.pybamm_model.get_parameter_info()
+
+        reduced_info = dict()
+        for param, param_type in info.values():
+            param_name = getattr(param, "name", str(param))
+            reduced_info[param_name] = param_type
+
+        if print_info:
+            for param, param_type in info.values():
+                print(param, " : ", param_type)
+
+        return reduced_info

tests/unit/test_models.py

@@ -1,3 +1,6 @@
+import sys
+from io import StringIO
+
 import numpy as np
 import pybamm
 import pytest
@@ -368,3 +371,24 @@ def test_non_converged_solution(self):
         for key in problem.signal:
             assert np.allclose(output.get(key, [])[0], output.get(key, []))
             assert np.allclose(output_S1.get(key, [])[0], output_S1.get(key, []))
+
+    @pytest.mark.unit
+    def test_get_parameter_info(self, model):
+        if isinstance(model, pybop.empirical.Thevenin):
+            # Test at least one model without a built pybamm model
+            model = pybop.empirical.Thevenin(build=False)
+
+        parameter_info = model.get_parameter_info()
+        assert isinstance(parameter_info, dict)
+
+        captured_output = StringIO()
+        sys.stdout = captured_output
+
+        model.get_parameter_info(print_info=True)
+        sys.stdout = sys.__stdout__
+
+        printed_messaage = captured_output.getvalue().strip()
+
+        for key, value in parameter_info.items():
+            assert key in printed_messaage
+            assert value in printed_messaage