helpful comments

super-resolution-games.py

@@ -319,6 +319,7 @@ _DATA_FILES_GAME_ENGINE = {
     }
 }
 
+# we need to form lists with same resolutions to get all project at once
 _DATA_FILES_GAME_ENGINE_KEYS = list(_DATA_FILES_GAME_ENGINE.keys())
 _DATA_FILES_GAME_ENGINE['GameEngine_All'] = {
     'train': {
@@ -404,6 +405,7 @@ _DATA_FILES_DOWNSCALE = {
     }
 }
 
+# we need to form lists with same resolutions to get all project at once
 _DATA_FILES_DOWNSCALE_KEYS = list(_DATA_FILES_DOWNSCALE.keys())
 _DATA_FILES_DOWNSCALE['Downscale_All'] = {
     'train': {
@@ -482,6 +484,7 @@ class SuperResolutionGames(datasets.GeneratorBasedBuilder):
         train_archives_downloaded = {}
         for k in train_archives.keys():
             train_archives_k = train_archives[k]
+            # str - single project, list - all GameEngine / Downscale projects
             if isinstance(train_archives_k, str):
                 train_archives_downloaded[k] = \
                     dl_manager.download(train_archives_k)
@@ -496,6 +499,7 @@ class SuperResolutionGames(datasets.GeneratorBasedBuilder):
         val_archives_downloaded = {}
         for k in val_archives.keys():
             val_archives_k = val_archives[k]
+            # str - single project, list - all GameEngine / Downscale projects
             if isinstance(val_archives_k, str):
                 val_archives_downloaded[k] = \
                     dl_manager.download(val_archives_k)
@@ -510,6 +514,7 @@ class SuperResolutionGames(datasets.GeneratorBasedBuilder):
         train_gen_kwargs = {}
         for k in train_archives_downloaded.keys():
             train_archives_downloaded_k = train_archives_downloaded[k]
+            # str - single project, list - all GameEngine / Downscale projects
             if isinstance(train_archives_downloaded_k, list):
                 train_gen_kwargs[k] = chain.from_iterable([
                     dl_manager.iter_archive(train_archives_downloaded_k[i]) \
@@ -522,6 +527,7 @@ class SuperResolutionGames(datasets.GeneratorBasedBuilder):
         val_gen_kwargs = {}
         for k in val_archives_downloaded.keys():
             val_archives_downloaded_k = val_archives_downloaded[k]
+            # str - single project, list - all GameEngine / Downscale projects
             if isinstance(val_archives_downloaded_k, list):
                 val_gen_kwargs[k] = chain.from_iterable([
                     dl_manager.iter_archive(val_archives_downloaded_k[i]) \