在我的 linux raspbian 发行版上安装 python 3.6.8 后，当我尝试安装 libunwind8 时出现错误：
ModuleNotFoundError: No module named 'apt_pkg'
调试后我发现以下 SO 页面错误答案没有帮助：导入错误没有名为 apt-pkg 的模块
给出的答案说安装python-apt，我做了，只是得到以下错误：
Traceback (most recent call last):
File "/usr/bin/apt-listchanges", line 29, in <module>
import apt_pkg
ModuleNotFoundError: No module named 'apt_pkg'
(Reading database ... 41347 files and directories currently installed.)
Preparing to unpack .../gnupg-agent_2.1.18-8~deb9u4_armhf.deb ...
Unpacking gnupg-agent (2.1.18-8~deb9u4) over (2.1.18-8~deb9u3) ...
Setting up gnupg-agent (2.1.18-8~deb9u4) ...
(Reading database ... 41347 files and directories currently installed.)
Preparing to unpack .../gnupg_2.1.18-8~deb9u4_armhf.deb ...
Unpacking gnupg …