Merge pull request #318 from allrob23/master

Author: TahirJalilov

emoji/unicode_codes/__init__.py

@@ -4,7 +4,7 @@
 from functools import lru_cache
 from warnings import warn
 
-from typing import Any, BinaryIO, Dict, List, Optional
+from typing import Any, BinaryIO, Dict, Optional, Set
 
 from emoji.unicode_codes.data_dict import STATUS, LANGUAGES
 
@@ -18,7 +18,7 @@
 
 _DEFAULT_KEYS = ('en', 'alias', 'E', 'status')  # The keys in emoji.json
 
-_loaded_keys: List[str] = list(
+_loaded_keys: Set[str] = set(
     _DEFAULT_KEYS
 )  # Keep track of keys already loaded from json files to avoid loading them twice
 
@@ -89,7 +89,7 @@ def _load_default_from_json():
 
     with _open_file('emoji.json') as f:
         EMOJI_DATA = dict(json.load(f, object_pairs_hook=EmojiDataDict))  # type: ignore
-    _loaded_keys = list(_DEFAULT_KEYS)
+    _loaded_keys = set(_DEFAULT_KEYS)
 
 
 def load_from_json(key: str):
@@ -105,7 +105,7 @@ def load_from_json(key: str):
         for emj, value in json.load(f).items():
             EMOJI_DATA[emj][key] = value  # type: ignore
 
-    _loaded_keys.append(key)
+    _loaded_keys.add(key)
 
 
 _load_default_from_json()