whitespace handling

app.py

@@ -75,6 +75,10 @@ def process_results(results, highlight_terms):
 
 def scisearch(query, language, num_results=10):
     try:
+        query = query.strip()
+        if query == "" or query is None:
+            return ""
+
         post_data = {"query": query, "k": num_results}
         if language != "detect_language":
             post_data["lang"] = language
@@ -224,13 +228,14 @@ if __name__ == "__main__":
             flag_btn.click(flag, inputs=[query, lang, k, flag_txt], outputs=[flag_txt])
 
         def submit(query, lang, k):
-            if query == "":
-                return ["", ""]
+            query = query.strip()
+            if query is None or query == "":
+                return "", ""
             return {
                 results: scisearch(query, lang, k),
                 flagging_form: gr.update(visible=True),
             }
-
+        query.submit(fn=submit, inputs=[query, lang, k], outputs=[results, flagging_form])
         submit_btn.click(submit, inputs=[query, lang, k], outputs=[results, flagging_form])
 
     demo.launch(enable_queue=True, debug=True)