Join threads before exitting

spotdl.py

@@ -13,6 +13,7 @@ import urllib.request
 import sys
 import os
 import time
+import threading
 
 
 def generate_songname(tags):
@@ -374,6 +375,14 @@ def grab_single(raw_song, number=None):
     if not check_exists(file_name, raw_song, islist=islist):
         if download_song(file_name, content):
             print('')
+            thread = threading.Thread(target=finalize, args=(file_name, meta_tags))
+            threads.append(thread)
+            thread.start()
+        else:
+            print('No audio streams available')
+
+
+def finalize(file_name, meta_tags):
     input_song = file_name + args.input_ext
     output_song = file_name + args.output_ext
     convert.song(input_song, output_song, args.folder,
@@ -383,8 +392,6 @@ def grab_single(raw_song, number=None):
 
     if not args.no_metadata:
         metadata.embed(os.path.join(args.folder, output_song), meta_tags)
-        else:
-            print('No audio streams available')
 
 
 class TestArgs(object):
@@ -403,6 +410,7 @@ if __name__ == '__main__':
     args = misc.get_arguments()
 
     misc.filter_path(args.folder)
+    threads = []
 
     if args.song:
         grab_single(raw_song=args.song)
@@ -412,6 +420,9 @@ if __name__ == '__main__':
         grab_playlist(playlist=args.playlist)
     elif args.username:
         feed_playlist(username=args.username)
+
+    for thread in threads:
+        thread.join()
 else:
     misc.filter_path('Music')
     args = TestArgs()