is not -> != ; this should resolve error but unsure as to why this arose.

app.py

@@ -114,7 +114,7 @@ _, center, _ = st.columns([1, 10, 1])
 with center:
     st.image(show_image)
 
-    if sub is None and imageLoader.text_transform(cap_prompt) is not "":
+    if sub is None and imageLoader.text_transform(cap_prompt) != "":
         st.write("Without a specified subreddit we default to /r/pics")
     for i in range(num_captions):
         gen_show_caption(sub, imageLoader.text_transform(cap_prompt))