几天前，我开始看到一个红色圆圈，里面有一条白线，上面写着：“检查更新时出现问题“
当我在该菜单中选择“显示更新”时，我在系统日志中看到以下内容：
May 23 10:00:05 scorpio gnome-session[2032]: Traceback (most recent call last):
May 23 10:00:05 scorpio gnome-session[2032]: File "/usr/bin/update-manager", line 38, in <module>
May 23 10:00:05 scorpio gnome-session[2032]: from UpdateManager.UpdateManager import UpdateManager
May 23 10:00:05 scorpio gnome-session[2032]: File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 57, in <module>
May 23 10:00:05 scorpio gnome-session[2032]: from .MetaReleaseGObject import MetaRelease
May 23 10:00:05 scorpio gnome-session[2032]: File "/usr/lib/python3/dist-packages/UpdateManager/MetaReleaseGObject.py", line 25, in <module>
May 23 10:00:05 scorpio gnome-session[2032]: from .Core.MetaRelease import MetaReleaseCore
May 23 10:00:05 scorpio gnome-session[2032]: File "/usr/lib/python3/dist-packages/UpdateManager/Core/MetaRelease.py", line 25, in <module>
May 23 10:00:05 scorpio gnome-session[2032]: import apt
May 23 10:00:05 scorpio gnome-session[2032]: File "/usr/lib/python3/dist-packages/apt/__init__.py", line 26, in <module>
May 23 10:00:05 scorpio gnome-session[2032]: from apt.package import Package
May 23 10:00:05 scorpio gnome-session[2032]: File "/usr/lib/python3/dist-packages/apt/package.py", line 42, in <module>
May 23 10:00:05 scorpio gnome-session[2032]: import apt.progress.text
May 23 10:00:05 scorpio gnome-session[2032]: ImportError: No module named 'apt.progress'
May 23 10:00:05 scorpio gnome-session[2032]: Error in sys.excepthook:
May 23 10:00:05 scorpio gnome-session[2032]: Traceback (most recent call last):
May 23 10:00:05 scorpio gnome-session[2032]: File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 63, in apport_excepthook
May 23 10:00:05 scorpio gnome-session[2032]: from apport.fileutils import likely_packaged, get_recent_crashes
May 23 10:00:05 scorpio gnome-session[2032]: File "/usr/lib/python3/dist-packages/apport/__init__.py", line 5, in <module>
May 23 10:00:05 scorpio gnome-session[2032]: from apport.report import Report
May 23 10:00:05 scorpio gnome-session[2032]: File "/usr/lib/python3/dist-packages/apport/report.py", line 30, in <module>
May 23 10:00:05 scorpio gnome-session[2032]: import apport.fileutils
May 23 10:00:05 scorpio gnome-session[2032]: File "/usr/lib/python3/dist-packages/apport/fileutils.py", line 23, in <module>
May 23 10:00:05 scorpio gnome-session[2032]: from apport.packaging_impl import impl as packaging
May 23 10:00:05 scorpio gnome-session[2032]: File "/usr/lib/python3/dist-packages/apport/packaging_impl.py", line 23, in <module>
May 23 10:00:05 scorpio gnome-session[2032]: import apt
May 23 10:00:05 scorpio gnome-session[2032]: File "/usr/lib/python3/dist-packages/apt/__init__.py", line 26, in <module>
May 23 10:00:05 scorpio gnome-session[2032]: from apt.package import Package
May 23 10:00:05 scorpio gnome-session[2032]: File "/usr/lib/python3/dist-packages/apt/package.py", line 42, in <module>
May 23 10:00:05 scorpio gnome-session[2032]: import apt.progress.text
May 23 10:00:05 scorpio gnome-session[2032]: ImportError: No module named 'apt.progress'
May 23 10:00:05 scorpio gnome-session[2032]: Original exception was:
May 23 10:00:05 scorpio gnome-session[2032]: Traceback (most recent call last):
May 23 10:00:05 scorpio gnome-session[2032]: File "/usr/bin/update-manager", line 38, in <module>
May 23 10:00:05 scorpio gnome-session[2032]: from UpdateManager.UpdateManager import UpdateManager
May 23 10:00:05 scorpio gnome-session[2032]: File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 57, in <module>
May 23 10:00:05 scorpio gnome-session[2032]: from .MetaReleaseGObject import MetaRelease
May 23 10:00:05 scorpio gnome-session[2032]: File "/usr/lib/python3/dist-packages/UpdateManager/MetaReleaseGObject.py", line 25, in <module>
May 23 10:00:05 scorpio gnome-session[2032]: from .Core.MetaRelease import MetaReleaseCore
May 23 10:00:05 scorpio gnome-session[2032]: File "/usr/lib/python3/dist-packages/UpdateManager/Core/MetaRelease.py", line 25, in <module>
May 23 10:00:05 scorpio gnome-session[2032]: import apt
May 23 10:00:05 scorpio gnome-session[2032]: File "/usr/lib/python3/dist-packages/apt/__init__.py", line 26, in <module>
May 23 10:00:05 scorpio gnome-session[2032]: from apt.package import Package
May 23 10:00:05 scorpio gnome-session[2032]: File "/usr/lib/python3/dist-packages/apt/package.py", line 42, in <module>
May 23 10:00:05 scorpio gnome-session[2032]: import apt.progress.text
May 23 10:00:05 scorpio gnome-session[2032]: ImportError: No module named 'apt.progress'
运行软件中心时，我遇到了类似的错误（关于 apt.progress Python 模块）。
在寻找答案时，我发现软件更新程序存在很多问题，但似乎都没有解决这个问题。
我点击“升级“在更新程序中，但没有升级。我最近还使用apt-get命令行安装了 mysql。我精通命令行（Solaris、OSX）和中级 Linux。我不确定我需要用 Python 做什么来解决这个问题。我最近将我的日常工作流程从 OSX 迁移到 Ubuntu，如果没有必要，我不愿意尝试重新安装和重新配置一切。
答案1
似乎某个软件包已损坏，缺少一些重要文件。您需要重新安装该软件包python3-apt，并且为了安全起见，请执行以下操作ubuntu-desktop：
sudo apt-get install --reinstall ubuntu-desktop python3-apt
为了尽早甚至在将来自动检测损坏的软件包，您可以参考“Ubuntu 有健全性检查吗？”。