Update app.py

app.py

@@ -67,11 +67,13 @@ def SpeechSynthesis(result):
     components.html(documentHTML5, width=1280, height=300)
 
 def parse_to_markdown(text):
-    fields = text.split("|")
-    markdown = ""
-    for field in fields:
-        field = field.strip(" '")
-        markdown += field + "\n\n"
+    markdown=''
+    if len(text) > 0:
+        fields = text.split("|")
+        markdown = ""
+        for field in fields:
+            field = field.strip(" '")
+            markdown += field + "\n\n"
     return markdown
     
 def search_arxiv(query):