logging + proper saving finish

pull.py

@@ -4,11 +4,12 @@ import auth
 import json
 import pprint
 import spotipy
+import logging
 import spotipy.util as util
 
 def main():
     # Get Authorization
-    print('Authorizing with Spotify')
+    logging.info('Authorizing with Spotify (may require User interaction).')
     token = util.prompt_for_user_token(
         username=auth.username,
         scope=auth.scope,
@@ -17,16 +18,23 @@ def main():
         redirect_uri=auth.redirect_uri
     )
     sp = spotipy.Spotify(auth=token)
-    print('Authorized')
+    logging.info('Authorized with Spotify.')
 
-    curoffset, curlimit = 0, 50
+    root = sys.path[0]
+    curoffset, curlimit = 900, 50
     # Start grabbing tracks (long running)
-    while True:
+    while curoffset >= 0:
+        logging.debug('Requesting tracks {} to {}'.format(curoffset, curoffset + curlimit.))
         response = sp.current_user_saved_tracks(limit=curlimit, offset=curoffset)
-        if response is not None:
-            print('Received ')
-            filename = f'saved-tracks-{curoffset}-{curoffset + curlimit}.json'
-            filepath = os.path.join(root, 'tracks', filename)
-            with open(filepath, 'w+') as file:
-                json.dump(response, file)
-                curoffset += curlimit
+        received = len(response['items'])
+        logging.debug('Received tracks {} to {}'.format(curoffset, curoffset + received))
+        filename = f'saved-tracks-{curoffset}-{curoffset + received}.json'
+        filepath = os.path.join(root, 'tracks', filename)
+        with open(filepath, 'w+') as file:
+            json.dump(response, file)
+        curoffset += curlimit
+        logging.debug('Saved at "{}" ({}KB)'.format(f'\\tracks\\{filename}', round(os.path.getsize(filepath) / 1024, 2)))
+        if received < curlimit:
+            logging.info('Done requesting/saving tracks after {} tracks.'.format())
+
+main()