Fix bug if crawler returns None for fields - ds

app.py

@@ -49,10 +49,20 @@ def fetch_text(url,api_key):
     print("response",response)
     if response.status_code == 200:
         print("response.json()",response.json())
+        
         maintext_text = json.loads(response.json())['maintext']
         summary_text = json.loads(response.json())['description']
         title_text = json.loads(response.json())['title']
 
+        If maintext_text is None:
+            maintext_text = ""
+        
+        If summary_text is None:
+            summary_text = ""
+        
+        If summary_text is None:
+            summary_text = ""
+
 
         return maintext_text, summary_text, title_text
     else :