无法安装软件，因为 apt/dpkg 中出现“No module named 'debconf'”错误

Question

每次尝试安装任何应用程序时都会收到此错误消息。

Setting up apt-listchanges (3.8) ...
Traceback (most recent call last):
File "/tmp/tmp.agLdMrHHO6.aptlc/debconf-helper.py", line 6, in <module>
import debconf
ImportError: No module named 'debconf'
dpkg: error processing package apt-listchanges (--configure):
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
apt-listchanges
E: Sub-process /usr/bin/dpkg returned an error code (1) 

Answer 1

您收到此错误是因为您的 Python 3 安装已损坏。它无法导入debconf模块。您可以通过尝试以下操作来确认这一点：

$ python3 -m debconf
/usr/bin/python3: No module named debconf

如果是这种情况，您应该检查该debconf.py文件是否存在/usr/lib/python3/dist-packages以及该目录是否在您的sys.path.

过去，我在安装自定义 Python 解释器时遇到过这个问题。确保命令type python3返回/usr/bin/python3.