Fixed #1 - use logger

SaveMyPlaylist.py

 from __future__ import unicode_literals
 
 import json
+import logging
 import os
 import sys
 
@@ -11,6 +12,31 @@ import youtube_dl
 VERSION = (2, 0, 0)
 
 
+def prepare_logging() -> logging.Logger:
+    LOG_FORMAT = '[%(levelname)-7s] - %(asctime)s - %(message)s'
+    DATE_FORMAT = '%Y-%m-%d %H:%M:%S'
+
+    LOG_FORMATTER = logging.Formatter(fmt=LOG_FORMAT, datefmt=DATE_FORMAT)
+
+    logger = logging.getLogger('SaveMyPlaylist')
+    logger.setLevel(logging.DEBUG)
+
+    outHandler = logging.StreamHandler(sys.stdout)
+    outHandler.setFormatter(LOG_FORMATTER)
+    outHandler.setLevel(logging.DEBUG)
+    outHandler.addFilter(lambda record: record.levelno <= logging.INFO)
+    logger.addHandler(outHandler)
+
+    errHandler = logging.StreamHandler(sys.stderr)
+    errHandler.setFormatter(LOG_FORMATTER)
+    errHandler.setLevel(logging.WARNING)
+    logger.addHandler(errHandler)
+    return logger
+
+
+logger = prepare_logging()
+
+
 class MyLogger(object):
     def debug(self, msg):
         pass
@@ -24,7 +50,7 @@ class MyLogger(object):
 
 def my_hook(d):
     if d['status'] == 'finished':
-        print('Download finished!')
+        logger.info('Download finished!')
 
 
 class SaveMyPlaylist:
@@ -39,8 +65,8 @@ class SaveMyPlaylist:
     ILLEGAL_CHARS = ['NUL', '\',''//', ':', '*', '"', '<', '>', '|']
 
     def __init__(self, apiKey, playlistId):
-        print('### SaveMyPlaylist v{} ###'.format('.'.join(str(i) for i in VERSION)))
-        print('=============================\n')
+        logger.info('### SaveMyPlaylist v{} ###'.format('.'.join(str(i) for i in VERSION)))
+        logger.info('=============================')
         self._apiKey = apiKey
         self._playlistId = playlistId
         self._youtubeApi = googleapiclient.discovery.build(self.API_NAME, self.API_VERSION, developerKey=self._apiKey)
@@ -54,7 +80,7 @@ class SaveMyPlaylist:
             pageItems, nextPageToken = self.__fetch_playlist_items(nextPageToken)
             items.extend(pageItems)
 
-        print('\n>>> Found {} items in playlist\n'.format(len(items)))
+        logger.info('>>> Found {} items in playlist'.format(len(items)))
         return items
 
     def __fetch_playlist_items(self, nextPageToken=None):
@@ -75,13 +101,14 @@ class SaveMyPlaylist:
         response = request.execute()
 
         items = []
+        logger.info('Found {} videos in playlist'.format(len(response['items'])))
         for item in response['items']:
             snippet = item['snippet']
             title = snippet['title']
             channel = snippet['channelTitle']
             videoId = snippet['resourceId']['videoId']
             items.append((channel, title, videoId))
-            print('{} - {} (videoId: {})'.format(channel, title, videoId))
+            logger.info('{} - {} (videoId: {})'.format(channel, title, videoId))
 
         nextPageToken = None
         if 'nextPageToken' in response:
@@ -91,22 +118,22 @@ class SaveMyPlaylist:
 
     def download_items(self, destinationFolder, debug=False):
         os.makedirs(destinationFolder, exist_ok=True)
-        print('>>> Scanning destination folder...')
+        logger.info('>>> Scanning destination folder...')
         downloadedVideos = [f for f in os.listdir(destinationFolder) if
                             os.path.isfile(os.path.join(destinationFolder, f)) and f.endswith('.mp4')]
 
-        print('>>> Found {} videos in destination folder'.format(len(downloadedVideos)))
+        logger.info('>>> Found {} videos in destination folder'.format(len(downloadedVideos)))
 
-        print('\n>>> Started Downloading...')
+        logger.info('>>> Started Downloading...')
         newVideos = []
         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))
+                logger.info('Skipping {}/{}: "{}" as it already exists'.format(idx + 1, len(self._items), fileName))
                 continue
 
-            print('Downloading {}/{}: "{}"'.format(idx + 1, len(self._items), fileName))
+            logger.info('Downloading {}/{}: "{}"'.format(idx + 1, len(self._items), fileName))
             newVideos.append(item)
 
             ydl_opts = {
@@ -123,8 +150,8 @@ class SaveMyPlaylist:
             with youtube_dl.YoutubeDL(ydl_opts) as ydl:
                 ydl.download(['https://www.youtube.com/watch?v={}'.format(item[self.VIDEO_ID])])
 
-        print('\n>>> Finished Downloading')
-        print('Downloaded {} new videos'.format(len(newVideos)))
+        logger.info('>>> Finished Downloading')
+        logger.info('Downloaded {} new videos'.format(len(newVideos)))
 
     def __escape_file_name(self, fileName):
         for char in self.ILLEGAL_CHARS: