fix progressbar callback

youtube_upload/main.py

@@ -64,13 +64,12 @@ def get_progress_info():
     progressinfo = struct("ProgressInfo", ["callback", "finish"])
 
     if progressbar:
-        widgets = [
+        bar = progressbar.ProgressBar(widgets=[
             progressbar.Percentage(), ' ',
             progressbar.Bar(), ' ',
             progressbar.ETA(), ' ',
             progressbar.FileTransferSpeed(),
-        ]
-        bar = progressbar.ProgressBar(widgets=widgets)
+        ])
         def _callback(total_size, completed):
             if not hasattr(bar, "next_update"):
                 if hasattr(bar, "maxval"):
@@ -84,7 +83,7 @@ def get_progress_info():
                 return bar.finish()
         return progressinfo(callback=_callback, finish=_finish)
     else:
-        return progressinfo(callback=lambda: None, finish=lambda: True)
+        return progressinfo(callback=None, finish=lambda: True)
 
 def get_category_id(category):
     """Return category ID from its name."""