软件属性-gtk 无法在 Ubuntu 18.04 LTS 中打开

软件属性-gtk 无法在 Ubuntu 18.04 LTS 中打开

当我尝试通过终端打开它时,它返回错误:

 Traceback (most recent call last):
  File "/usr/bin/software-properties-gtk", line 37, in <module>
    from softwareproperties.gtk.SoftwarePropertiesGtk import SoftwarePropertiesGtk
  File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 35, in <module>
    from aptdaemon import client
  File "/usr/lib/python3/dist-packages/aptdaemon/client.py", line 1570
    async = reply_handler and error_handler
          ^
SyntaxError: invalid syntax

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