Update app.py

Fixed error in how I initialized the list_ret

app.py

@@ -54,7 +54,7 @@ def webpage_contents_soup_paragraphs(response_content:bytes)->list:
         response_content: response.content value returned by webpage_contents_get tool.
     '''
     soup = BeautifulSoup(response_content, "html.parser")
-    list_ret
+    list_ret = list()
     for paragraph  in soup.find_all("p"):
         ret_t = paragraph.text
         #print(link.get("href"))
@@ -68,7 +68,7 @@ def webpage_contents_soup_links(response_content:bytes)->list:
         response_content: response.content value returned by webpage_contents_get tool.
     '''
     soup = BeautifulSoup(response_content, "html.parser")
-    list_ret
+    list_ret = list()
     for link in soup.find_all("a"):
         ret_t = link.get("href")
         list_ret.append(ret_t)