我在Debian系统上做了一些事情，不允许我安装或删除任何东西。

Question

以下是apt更新/ apt升级/ apt dist升级的结果

sudo apt dist-upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages will be upgraded:
  python-cryptography
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
24 not fully installed or removed.
Need to get 0 B/212 kB of archives.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
Reading changelogs... Done
(Reading database ... 81174 files and directories currently installed.)
Preparing to unpack .../python-cryptography_1.7.1-3+deb9u2_amd64.deb ...
  File "/usr/bin/pyclean", line 63
    except (IOError, OSError), e:
                             ^
SyntaxError: invalid syntax
dpkg: warning: subprocess old pre-removal script 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-cryptography_1.7.1-3+deb9u2_amd64.deb (--unpack):
 subprocess new pre-removal script returned error exit status 1
Traceback (most recent call last):
  File "/usr/bin/pycompile", line 35, in <module>
    from debpython.version import SUPPORTED, debsorted, vrepr, \
  File "/usr/share/python/debpython/version.py", line 24, in <module>
    from ConfigParser import SafeConfigParser
ImportError: No module named 'ConfigParser'
dpkg: error while cleaning up:
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 /var/cache/apt/archives/python-cryptography_1.7.1-3+deb9u2_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

我不太清楚我在这里到底做了什么，但我无法克服。我似乎不能删除那个包，或者修复它，或者重新安装它，所有的东西都会因为这个或者类似的错误而失败。有人能帮我把这该死的东西处理掉吗?我已经试了几天了。

谢谢！

Answer 1

今天我也遇到了这个问题，python密码学也以类似的方式阻止了我。

我在python密码软件包上手动运行py洁净。我是root用户，所以您可能需要将sudo放在命令的前面。

/usr/bin/pyclean python-cryptography

这使我陷入了一组不同的错误(很可能与您的问题无关)。我的系统很坏)，但是dpkg很高兴能重新开始工作。试试看

-Tom

Answer 2

谢谢汤姆，虽然这不是我的问题，但它确实使我走上了正确的道路。基本上，这整个问题是因为我在某个时候将Python3.5设置为默认的，而且显然Debian由于任何原因都找不到解决这个问题的方法。我一恢复到2.7，一切都很好。