members should be accessible by debugger

SaveMyPlaylist.py

@@ -42,10 +42,10 @@ class SaveMyPlaylist:
     def __init__(self, apiKey, playlistId):
         print('### SaveMyPlaylist v{} ###'.format('.'.join(str(i) for i in VERSION)))
         print('=============================\n')
-        self.__apiKey = apiKey
-        self.__playlistId = playlistId
-        self.__youtubeApi = googleapiclient.discovery.build(self.API_NAME, self.API_VERSION, developerKey=self.__apiKey)
-        self.__items = self.__fetch_all_playlist_items()
+        self._apiKey = apiKey
+        self._playlistId = playlistId
+        self._youtubeApi = googleapiclient.discovery.build(self.API_NAME, self.API_VERSION, developerKey=self._apiKey)
+        self._items = self.__fetch_all_playlist_items()
 
     def __fetch_all_playlist_items(self):
         items = []
@@ -60,15 +60,15 @@ class SaveMyPlaylist:
 
     def __fetch_playlist_items(self, nextPageToken=None):
         if nextPageToken is None or nextPageToken == 0:
-            request = self.__youtubeApi.playlistItems().list(
+            request = self._youtubeApi.playlistItems().list(
                 part='snippet',
-                playlistId=self.__playlistId,
+                playlistId=self._playlistId,
                 maxResults=50,
             )
         else:
-            request = self.__youtubeApi.playlistItems().list(
+            request = self._youtubeApi.playlistItems().list(
                 part='snippet',
-                playlistId=self.__playlistId,
+                playlistId=self._playlistId,
                 maxResults=50,
                 pageToken=nextPageToken
             )
@@ -100,14 +100,14 @@ class SaveMyPlaylist:
 
         print('\n>>> Started Downloading...')
         newVideos = []
-        for idx, item in enumerate(self.__items):
+        for idx, item in enumerate(self._items):
             fileName = '{} - {}.mp4'.format(item[self.TITLE], item[self.CHANNEL])
             fileName = self.__escape_file_name(fileName)
             if fileName in downloadedVideos:
-                print('Skipping {}/{}: "{}" as it already exists'.format(idx + 1, len(self.__items), fileName))
+                print('Skipping {}/{}: "{}" as it already exists'.format(idx + 1, len(self._items), fileName))
                 continue
 
-            print('Downloading {}/{}: "{}"'.format(idx + 1, len(self.__items), fileName))
+            print('Downloading {}/{}: "{}"'.format(idx + 1, len(self._items), fileName))
             newVideos.append(item)
 
             ydl_opts = {