Removed redundant re import in mistral; minor linting using pre-commi…

…t hooks

src/vanna/mistral/mistral.py

@@ -1,33 +1,36 @@
 from mistralai.client import MistralClient
 from mistralai.models.chat_completion import ChatMessage
+
 from ..base import VannaBase
-import re
+
 
 class Mistral(VannaBase):
     def __init__(self, config=None):
         if config is None:
-            raise ValueError("For Mistral, config must be provided with an api_key and model")
+            raise ValueError(
+                "For Mistral, config must be provided with an api_key and model"
+            )
 
-        if 'api_key' not in config:
+        if "api_key" not in config:
             raise ValueError("config must contain a Mistral api_key")
-        
-        if 'model' not in config:
+
+        if "model" not in config:
             raise ValueError("config must contain a Mistral model")
 
-        api_key = config['api_key']
-        model = config['model']
+        api_key = config["api_key"]
+        model = config["model"]
         self.client = MistralClient(api_key=api_key)
         self.model = model
 
     def system_message(self, message: str) -> any:
         return ChatMessage(role="system", content=message)
-    
+
     def user_message(self, message: str) -> any:
         return ChatMessage(role="user", content=message)
-    
+
     def assistant_message(self, message: str) -> any:
         return ChatMessage(role="assistant", content=message)
-    
+
     def generate_sql(self, question: str, **kwargs) -> str:
         # Use the super generate_sql
         sql = super().generate_sql(question, **kwargs)
@@ -42,5 +45,5 @@ def submit_prompt(self, prompt, **kwargs) -> str:
             model=self.model,
             messages=prompt,
         )
-        
+
         return chat_response.choices[0].message.content