:~$ sudo apt-get install python3-pexpect
Reading package lists... Done
Building dependency tree       
Reading state information... Done
python3-pexpect is already the newest version.
The following packages were automatically installed and are no longer required:
  freeglut3-dev libglew-dev libgoogle-perftools4 libtcmalloc-minimal4
  libunwind8 libv8-3.14.5 mongodb mongodb-clients mongodb-dev mongodb-server
  python-bson python-bson-ext python-gridfs python-pyassimp python-pymongo
  python-pymongo-ext ros-indigo-household-objects-database-msgs
  ros-indigo-ompl ros-indigo-pr2-arm-kinematics ros-indigo-pr2-moveit-plugins
  ros-indigo-warehouse-ros texmaker-data
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
  python-libxml2 python-samba
The following packages will be upgraded:
  python-libxml2 python-samba
2 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
6 not fully installed or removed.
Need to get 0 B/1.207 kB of archives.
After this operation, 1.024 B of additional disk space will be used.
Do you want to continue? [Y/n] y
(Reading database ... 844116 files and directories currently installed.)
Preparing to unpack .../python-libxml2_2.9.1+dfsg1-3ubuntu4.10_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-libxml2_2.9.1+dfsg1-3ubuntu4.10_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 
    from debpython.version import SUPPORTED, debsorted, vrepr, \
  File "/usr/share/python/debpython/version.py", line 24, in 
    from ConfigParser import SafeConfigParser
ImportError: No module named 'ConfigParser'
dpkg: error while cleaning up:
 subprocess installed post-installation script returned error exit status 1
Preparing to unpack .../python-samba_2%3a4.3.11+dfsg-0ubuntu0.14.04.12_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-samba_2%3a4.3.11+dfsg-0ubuntu0.14.04.12_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 
    from debpython.version import SUPPORTED, debsorted, vrepr, \
  File "/usr/share/python/debpython/version.py", line 24, in 
    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-libxml2_2.9.1+dfsg1-3ubuntu4.10_amd64.deb
 /var/cache/apt/archives/python-samba_2%3a4.3.11+dfsg-ubuntu0.14.04.12_amd64.deb

E: Sub-process /usr/bin/dpkg returned an error code (1)

It's due to the error:

File "/usr/bin/pyclean", line 63
    except (IOError, OSError), e:

Most probably it is because it's expecting python2.x instead of python3.

You must link /usr/bin/python to the appropriate version. If I'm not mistaken /usr/bin/python --version will output 3.x So maybe you need to create a symlink to python2.x:

ls -la /usr/bin/python  # you will see if there's a symlink towards some other file
rm /usr/bin/python      # only if it is a symlink!
ln -s /usr/bin/python2.x /usr/bin/python 

where 2.x is your version of python.

Or, more simply, but you need to have both 2.x and 3.x installed:

sudo update-alternatives --config python

Your Answer

 

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Not the answer you're looking for? Browse other questions tagged or ask your own question.