fix quirk with python's "mutable default arguments"

video_metadata/views/tmdb.py

@@ -1,12 +1,13 @@
 
 import cgi
-from dataclasses import dataclass
+from dataclasses import dataclass, field
 from datetime import date
 from enum import Enum
 import json
 import re
 from sqlite3 import DatabaseError
 import ssl
+from typing import Dict, List
 from urllib.error import URLError, HTTPError
 import urllib.parse
 import urllib.request
@@ -43,14 +44,14 @@ class query_type(Enum):
 
 @dataclass
 class query_data:
-    errors = []
-    full_url = ''
-    movie_year = 0
-    parsed_query_str = ''
+    errors: List[str] = field(default_factory=list)
+    full_url: str = ''
+    movie_year: int = 0
+    parsed_query_str: str = ''
     query_params = {}
-    query_type = query_type.UNKNOWN
-    raw_query_str = ''
-    rel_path = ''
+    query_type: query_type = query_type.UNKNOWN
+    raw_query_str: str = ''
+    rel_path: str = ''
 
 @dataclass
 class response_data:
@@ -141,9 +142,6 @@ def query_movie():
 
                 storeTMDBQueryResults(query, view_results)
 
-    errors.extend(query.errors)
-    errors.extend(response.errors)
-
     if errors:
         view_results.clear()
         flash(errors)
@@ -217,7 +215,9 @@ def parseQueryStr(query_obj):
 
     # TODO: parse tv show titles
     if query_obj.query_type == query_type.UNKNOWN:
-        query_obj.errors.append('{}: unable to determine query type'.format(util.getFunctionName()))
+        query_obj.errors.append('{}: unable to determine query type for {}'.format(
+            util.getFunctionName(), query_obj.raw_query_str)
+        )
         return False
 
     return True