url update

nba_tracking_data_15_16.py

@@ -197,9 +197,8 @@ class NbaTracking(datasets.GeneratorBasedBuilder):
           name = game['name'][:-3]
           _URLS[name] = _URL + "/" + name + ".7z"
             
-        _URLS = _URLS
+        urls = _URLS
         
-        urls = self._URLS
         data_dir = dl_manager.download_and_extract(urls)
         
         all_file_paths = {}