fix(issue): DallEAPIWrapper passes unsupported 'quality' param to OpenAI API (#179)

This PR fixes #177 , quality parameter will now only be sent if
specifically mentioned.

Signed-off-by: Siddarthreddygsr <[email protected]>

Author: siddarthreddygsr

libs/community/langchain_community/utilities/dalle_image_generator.py

@@ -62,7 +62,7 @@ class DallEAPIWrapper(BaseModel):
     """Size of image to generate"""
     separator: str = "\n"
     """Separator to use when multiple URLs are returned."""
-    quality: Optional[str] = "standard"
+    quality: Optional[str] = None
     """Quality of the image that will be generated"""
     max_retries: int = 2
     """Maximum number of retries to make when generating."""
@@ -140,15 +140,16 @@ def validate_environment(self) -> Self:
 
     def run(self, query: str) -> str:
         """Run query through OpenAI and parse result."""
-
         if is_openai_v1():
-            response = self.client.generate(
-                prompt=query,
-                n=self.n,
-                size=self.size,
-                model=self.model_name,
-                quality=self.quality,
-            )
+            kwargs = {
+                "prompt": query,
+                "n": self.n,
+                "size": self.size,
+                "model": self.model_name,
+            }
+            if self.quality is not None:
+                kwargs["quality"] = self.quality
+            response = self.client.generate(**kwargs)
             image_urls = self.separator.join([item.url for item in response.data])
         else:
             response = self.client.create(