fix(prompt/mixin): Add name property and add it to saving/loading pat…

…h. (explodinggradients#1853)

This pull request includes several changes to the `PromptMixin` class in
the `src/ragas/prompt/mixin.py` file. The changes focus on adding a
`name` attribute to the class and using this attribute when saving and
loading prompts. This solves the error when saving and loading several
prompts of different Synthesizers (e.g.
MultiHopAbstractQuerySynthesizer, MultiHopSpecificQuerySynthesizer,
SingleHopSpecificQuerySynthesizer etc.) as they had the same path
associated:

```
themes_personas_matching_prompt_english -> single_hop_specifc_query_synthesizer_themes_personas_matching_prompt_english
query_answer_generation_prompt_english -> single_hop_specifc_query_synthesizer_query_answer_generation_prompt_english
```

### Changes to `PromptMixin` class:

* Added a `name` attribute to the `PromptMixin` class.
* Modified the `save_prompts` method to include the `name` attribute in
the prompt file name.
* Modified the `load_prompts` method to include the `name` attribute in
the prompt file name.

---------

Co-authored-by: jjmachan <[email protected]>
Co-authored-by: Jithin James <[email protected]>

src/ragas/prompt/mixin.py

@@ -20,8 +20,9 @@ class PromptMixin:
     eg: [BaseSynthesizer][ragas.testset.synthesizers.base.BaseSynthesizer], [MetricWithLLM][ragas.metrics.base.MetricWithLLM]
     """
 
-    def _get_prompts(self) -> t.Dict[str, PydanticPrompt]:
+    name: str = ""
 
+    def _get_prompts(self) -> t.Dict[str, PydanticPrompt]:
         prompts = {}
         for key, value in inspect.getmembers(self):
             if isinstance(value, PydanticPrompt):
@@ -90,10 +91,13 @@ def save_prompts(self, path: str):
         prompts = self.get_prompts()
         for prompt_name, prompt in prompts.items():
             # hash_hex = f"0x{hash(prompt) & 0xFFFFFFFFFFFFFFFF:016x}"
-            prompt_file_name = os.path.join(
-                path, f"{prompt_name}_{prompt.language}.json"
-            )
-            prompt.save(prompt_file_name)
+            if self.name == "":
+                file_name = os.path.join(path, f"{prompt_name}_{prompt.language}.json")
+            else:
+                file_name = os.path.join(
+                    path, f"{self.name}_{prompt_name}_{prompt.language}.json"
+                )
+            prompt.save(file_name)
 
     def load_prompts(self, path: str, language: t.Optional[str] = None):
         """
@@ -113,7 +117,12 @@ def load_prompts(self, path: str, language: t.Optional[str] = None):
 
         loaded_prompts = {}
         for prompt_name, prompt in self.get_prompts().items():
-            prompt_file_name = os.path.join(path, f"{prompt_name}_{language}.json")
-            loaded_prompt = prompt.__class__.load(prompt_file_name)
+            if self.name == "":
+                file_name = os.path.join(path, f"{prompt_name}_{language}.json")
+            else:
+                file_name = os.path.join(
+                    path, f"{self.name}_{prompt_name}_{language}.json"
+                )
+            loaded_prompt = prompt.__class__.load(file_name)
             loaded_prompts[prompt_name] = loaded_prompt
         return loaded_prompts