python-apt包损坏: apt升级失败

Question

我在桌面上使用Ubuntu20.04.1。有可能，几个月前，我用python2文件重写了python3二进制文件，以使某些东西正常工作。(为什么任何正常的系统仍然安装python2？)

无论如何，我只是试图运行apt upgrade，但失败了，并将其归咎于python-apt包。

$ sudo apt upgrade

Preparing to unpack .../python-apt_2.0.0ubuntu0.20.04.2_amd64.deb ...
  File "/usr/bin/pyclean", line 63
    except (IOError, OSError), e:
                             ^
SyntaxError: invalid syntax
dpkg: warning: old python-apt package pre-removal script subprocess returned error exit status 1
dpkg: trying script from the new package instead ...
  File "/usr/bin/pyclean", line 63
    except (IOError, OSError), e:

SyntaxError: invalid syntax
dpkg: error processing archive /var/cache/apt/archives/python-apt_2.0.0ubuntu0.2
0.04.2_amd64.deb (--unpack):
 new python-apt package pre-removal script subprocess returned error exit status
 1
Traceback (most recent call last):
  File "/usr/bin/pycompile", line 35, in 
    from debpython.version import SUPPORTED, debsorted, vrepr, \
  File "/usr/share/python/debpython/version.py", line 24, in 
    from ConfigParser import SafeConfigParser
ModuleNotFoundError: No module named 'ConfigParser'
dpkg: error while cleaning up:
 installed python-apt package post-installation script subprocess returned error
 exit status 1
Errors were encountered while processing:
 /var/cache/apt/archives/python-apt_2.0.0ubuntu0.20.04.2_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

我试过清洗包裹，但也失败了：

$ apt purge python-apt
[...]
Do you want to continue? [Y/n] 
dpkg: error processing package python-apt (--remove):
 package is in a very bad inconsistent state; you should
 reinstall it before attempting a removal
dpkg: too many errors, stopping
Errors were encountered while processing:
 python-apt
Processing was halted because there were too many errors.
E: Sub-process /usr/bin/dpkg returned an error code (1)

二进制文件如下所示：

$ ll /usr/bin | grep python
-rwxr-xr-x  1 root   root           1057 Mar 13  2020 dh_python2*
lrwxrwxrwx  1 root   root             23 Aug  4 07:16 pdb2.7 -> ../lib/python2.7/pdb.py*
lrwxrwxrwx  1 root   root             23 Jul 28 08:59 pdb3.8 -> ../lib/python3.8/pdb.py*
lrwxrwxrwx  1 root   root             31 Mar 13  2020 py3versions -> ../share/python3/py3versions.py*
lrwxrwxrwx  1 root   root              7 Apr 15  2020 python -> python2*
lrwxrwxrwx  1 root   root              9 Mar 13  2020 python2 -> python2.7*
-rwxr-xr-x  1 root   root        5486352 Oct 25 14:14 python2.7*
lrwxrwxrwx  1 root   root              9 Mar 13  2020 python3 -> python3.8*
-rwxr-xr-x  1 root   root        5486352 Jul 28 08:59 python3.8*
-rwxr-xr-x  1 root   root            384 Mar 27  2020 python3-futurize*
-rwxr-xr-x  1 root   root            388 Mar 27  2020 python3-pasteurize*
lrwxrwxrwx  1 root   root             29 Mar 13  2020 pyversions -> ../share/python/pyversions.py*

这是我的版本信息：

$ python --version
Python 3.8.5
$ python2 --version
Python 3.8.5

Python2 one，考虑到/usr/bin中的符号链接，有点奇怪。有人有什么想法吗？

更新:我刚刚注意到错误信息的另一部分：

"ModuleNotFoundError: No module named 'ConfigParser'" 

我看到有人在网上写道，Python3将其称为“config分析器”(小写)。这就是问题所在吗？如果是的话，为什么其他人也没有经历过呢？

Answer 1

由于某种原因，我需要重新创建Python2二进制文件。我在此页上找到了我的解决方案，下面是它的工作原理：

apt-get download python2.7-minimal
ar x python2.7-minimal_2.7.18-1~20.04_amd64.deb data.tar.xz
sudo tar xJf data.tar.xz -C / './usr/bin/python2.7'
rm data.tar.xz