[Misc] Lint code and fix code smells (#1871)

mem0/graphs/configs.py

@@ -18,28 +18,16 @@ class Neo4jConfig(BaseModel):
             values.get("password"),
         )
         if not url or not username or not password:
-            raise ValueError(
-                "Please provide 'url', 'username' and 'password'."
-            )
+            raise ValueError("Please provide 'url', 'username' and 'password'.")
         return values
 
 
 class GraphStoreConfig(BaseModel):
-    provider: str = Field(
-        description="Provider of the data store (e.g., 'neo4j')", 
-        default="neo4j"
-    )
-    config: Neo4jConfig = Field(
-        description="Configuration for the specific data store",
-        default=None
-    )
-    llm: Optional[LlmConfig] = Field(
-        description="LLM configuration for querying the graph store",
-        default=None
-    )
+    provider: str = Field(description="Provider of the data store (e.g., 'neo4j')", default="neo4j")
+    config: Neo4jConfig = Field(description="Configuration for the specific data store", default=None)
+    llm: Optional[LlmConfig] = Field(description="LLM configuration for querying the graph store", default=None)
     custom_prompt: Optional[str] = Field(
-        description="Custom prompt to fetch entities from the given text",
-        default=None
+        description="Custom prompt to fetch entities from the given text", default=None
     )
 
     @field_validator("config")
@@ -49,4 +37,3 @@ class GraphStoreConfig(BaseModel):
             return Neo4jConfig(**v.model_dump())
         else:
             raise ValueError(f"Unsupported graph store provider: {provider}")
-