Update app.py

app.py

@@ -49,7 +49,7 @@ def load_b_lora_to_unet(pipe, content_lora_model_id: str = '', style_lora_model_
 
 def load_b_loras(content_b_lora, style_b_lora):
     
-    if content_b_lora is not None:
+    if content_b_lora is not "":
         # Get instance_prompt a.k.a trigger word
         content_model_card = ModelCard.load(content_b_lora)
         content_model_repo_data = content_model_card.data.to_dict()
@@ -57,7 +57,7 @@ def load_b_loras(content_b_lora, style_b_lora):
     else:
         content_model_instance_prompt = ''
 
-    if style_b_lora is not None:
+    if style_b_lora is not "":
         # Get instance_prompt a.k.a trigger word
         style_model_card = ModelCard.load(style_b_lora)
         style_model_repo_data = style_model_card.data.to_dict()