fix: prompt naming related issues

src/ragas/callbacks.py

@@ -164,7 +164,7 @@ def parse_run_traces(
                 prompt_trace = traces[prompt_uuid]
                 prompt_traces[f"{prompt_trace.name}"] = {
                     "input": prompt_trace.inputs.get("data", {}),
-                    "output": prompt_trace.outputs.get("output", {}),
+                    "output": prompt_trace.outputs.get("output", {})[0],
                 }
             metric_traces[f"{metric_trace.name}"] = prompt_traces
         parased_traces.append(metric_traces)

src/ragas/optimizers/genetic.py

@@ -514,7 +514,7 @@ def dict_to_str(dict: t.Dict[str, t.Any]) -> str:
                                 exclude_none=True
                             )
                         ),
-                        output=traces[idx][prompt_name]["output"][0].model_dump(
+                        output=traces[idx][prompt_name]["output"].model_dump(
                             exclude_none=True
                         ),
                         expected_output=dataset[idx]["prompts"][prompt_name][
@@ -586,14 +586,6 @@ def evaluate_candidate(
             _run_id=run_id,
             _pbar=parent_pbar,
         )
-        # remap the traces to the original prompt names
-        remap_traces = {val.name: key for key, val in self.metric.get_prompts().items()}
-        for trace in results.traces:
-            for key in remap_traces:
-                if key in trace[self.metric.name]:
-                    trace[self.metric.name][remap_traces[key]] = trace[
-                        self.metric.name
-                    ].pop(key)
         return results
 
     def evaluate_fitness(

src/ragas/prompt/mixin.py

@@ -21,14 +21,21 @@ class PromptMixin:
     eg: [BaseSynthesizer][ragas.testset.synthesizers.base.BaseSynthesizer], [MetricWithLLM][ragas.metrics.base.MetricWithLLM]
     """
 
+    def _get_prompts(self) -> t.Dict[str, PydanticPrompt]:
+
+        prompts = {}
+        for key, value in inspect.getmembers(self):
+            if isinstance(value, PydanticPrompt):
+                prompts.update({key: value})
+        return prompts
+
     def get_prompts(self) -> t.Dict[str, PydanticPrompt]:
         """
         Returns a dictionary of prompts for the class.
         """
         prompts = {}
-        for name, value in inspect.getmembers(self):
-            if isinstance(value, PydanticPrompt):
-                prompts.update({name: value})
+        for _, value in self._get_prompts().items():
+            prompts.update({value.name: value})
         return prompts
 
     def set_prompts(self, **prompts):
@@ -41,6 +48,7 @@ def set_prompts(self, **prompts):
             If the prompt is not an instance of `PydanticPrompt`.
         """
         available_prompts = self.get_prompts()
+        name_to_var = {v.name: k for k, v in self._get_prompts().items()}
         for key, value in prompts.items():
             if key not in available_prompts:
                 raise ValueError(
@@ -50,7 +58,7 @@ def set_prompts(self, **prompts):
                 raise ValueError(
                     f"Prompt with name '{key}' must be an instance of 'ragas.prompt.PydanticPrompt'"
                 )
-            setattr(self, key, value)
+            setattr(self, name_to_var[key], value)
 
     async def adapt_prompts(
         self, language: str, llm: BaseRagasLLM, adapt_instruction: bool = False