Instead of returning no element when problem with parsing, return an empty element

shared/txt_parser.py

@@ -31,6 +31,14 @@ def parse_txt(txt_data,parser):
     books = str(txt_data,"utf-8").split('\n')
     for book in books:
         if create_query_using_attributes_txt(book, query) == "NO DATA":
+            output.append({
+                "author": "",
+                "bibliographic": "",
+                "doi": "",
+                "doi score": "",
+                "doi_link": "",
+                "title": "",
+            })
             query = {}
             continue