Update soybean_dataset.py

soybean_dataset.py

@@ -134,7 +134,7 @@ class SoybeanDataset(datasets.GeneratorBasedBuilder):
         return r
     
     # Define the process_image function that uses the response from download
-    def process_image(image_url):
+    def process_image(self, image_url):
         response = download(image_url)
         img = Image.open(BytesIO(response.content))
         return img