执行sudo apt autoremove遇ModuleNotFoundError问题求助

问题重现 #

执行sudo apt autoremove等apt命令时，出现以下错误：

• ModuleNotFoundError: No module named 'six'
• ModuleNotFoundError: No module named 'requests_unixsocket'

即使通过pip list | grep six确认six已安装，重新安装两个包后问题仍存在。完整错误日志如下：

Reading package lists... Done
Building dependency tree       
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 76 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up update-notifier-common (3.192.30.19) ...
Traceback (most recent call last):
  File "/usr/lib/update-notifier/package-data-downloader", line 24, in <module>
    import debian.deb822
  File "/usr/lib/python3/dist-packages/debian/deb822.py", line 240, in <module>
    import six
ModuleNotFoundError: No module named 'six'
Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 72, in apport_excepthook
    from apport.fileutils import likely_packaged, get_recent_crashes
  File "/usr/lib/python3/dist-packages/apport/__init__.py", line 5, in <module>
    from apport.report import Report
  File "/usr/lib/python3/dist-packages/apport/report.py", line 32, in <module>
    import apport.fileutils
  File "/usr/lib/python3/dist-packages/apport/fileutils.py", line 12, in <module>
    import os, glob, subprocess, os.path, time, pwd, sys, requests_unixsocket
ModuleNotFoundError: No module named 'requests_unixsocket'

Original exception was:
Traceback (most recent call last):
  File "/usr/lib/update-notifier/package-data-downloader", line 24, in <module>
    import debian.deb822
  File "/usr/lib/python3/dist-packages/debian/deb822.py", line 240, in <module>
    import six
ModuleNotFoundError: No module named 'six'
dpkg: error processing package update-notifier-common (--configure):
 installed update-notifier-common package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
 update-notifier-common
E: Sub-process /usr/bin/dpkg returned an error code (1)

解决方案 #

问题根源是系统Python环境与pip安装的环境不一致：apt相关脚本调用的是系统Python，而pip默认可能将包安装到用户目录，系统脚本无法读取该路径。必须用系统包管理器安装对应deb包：

1. 重新安装six和requests_unixsocket的系统版本

sudo apt install --reinstall python3-six
sudo apt install --reinstall python3-requests-unixsocket

2. 修复未配置的update-notifier-common包

sudo dpkg --configure update-notifier-common

如果上述命令无效，强制重新安装该包：

sudo apt install --reinstall update-notifier-common

3. 验证修复
   再次执行sudo apt autoremove或sudo apt update，确认报错消失。

内容的提问来源于stack exchange，提问作者Bruno Henrique Peixoto