Update app.py

app.py

@@ -144,7 +144,7 @@ def process_images(
     # for demo purposes we allow for up to 3 different concepts and corresponding concept images 
     if concept_image1 is not None:
         concept_images.append(concept_image1)
-        if use_concpet_from_file_1 and concpet_from_file_1: # if concept is new from user input
+        if use_concpet_from_file_1 and concpet_from_file_1 is not None: # if concept is new from user input
             concept_descriptions.append(use_concpet_from_file_1)
             skip_load_concept[0] = True
         else:
@@ -155,7 +155,7 @@ def process_images(
     # Add second concept (optional)
     if concept_image2 is not None:
         concept_images.append(concept_image2)
-        if use_concpet_from_file_2 and concpet_from_file_2: # if concept is new from user input
+        if use_concpet_from_file_2 and concpet_from_file_2 is not None: # if concept is new from user input
             concept_descriptions.append(use_concpet_from_file_2)
             skip_load_concept[1] = True
         else:
@@ -164,7 +164,7 @@ def process_images(
     # Add third concept (optional)
     if concept_image3 is not None:
         concept_images.append(concept_image3)
-        if use_concpet_from_file_3 and concpet_from_file_3: # if concept is new from user input
+        if use_concpet_from_file_3 and concpet_from_file_3 is not None: # if concept is new from user input
             concept_descriptions.append(use_concpet_from_file_3)
             skip_load_concept[2] = True
         else: