Update app.py

app.py

@@ -47,7 +47,9 @@ def parse_md_link(md_link: str) -> Tuple[str, str]:
     """ parse markdown link to the title and link"""
     pattern = r'\[([^\]]+)\]\(([^)]+)\)'
     matches = re.findall(pattern, md_link)
-    return matches
+    if len(matches) > 0:
+        return matches[0]
+    return None
 
 def search_specific_website(topic: str, url: str, num_results: int):
     query = f"{url} {topic}"
@@ -56,7 +58,10 @@ def search_specific_website(topic: str, url: str, num_results: int):
     output = []
     for result in query_result:
         link, description = result.split("\n")
-        title, url = parse_md_link(link)
+        title_url = parse_md_link(link)
+        if title_url is None:
+            continue
+        title, url = title_url
         output.append(SearchResult(title=title, url=url, description=description))
     return output
     
@@ -88,7 +93,7 @@ def search_arxiv(topic: str, year: str = None, num_results: int = 10) -> str:
 
     output = []
     for result in query_results:
-        output.append("Title: {} Abstract: {}".format(result.title, get_arxiv_paper_abstract(result.url)))
+        output.append("Title: {}\nAbstract: {}".format(result.title, get_arxiv_paper_abstract(result.url)))
     return "\n\n".join(output)