Unattended upgrade returned: False

Packages that attempted to upgrade:
curl libcurl3-gnutls libicu55 
Packages with upgradable origin but kept back:
linux-generic linux-headers-generic 

Package installation log:
Log started: 2017-10-25 06:18:15
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(Reading database ... 136880 files and directories currently installed.)
Preparing to unpack .../curl_7.47.0-1ubuntu2.4_amd64.deb ...
Unpacking curl (7.47.0-1ubuntu2.4) over (7.47.0-1ubuntu2.3) ...
Preparing to unpack .../libcurl3-gnutls_7.47.0-1ubuntu2.4_amd64.deb ...
Unpacking libcurl3-gnutls:amd64 (7.47.0-1ubuntu2.4) over (7.47.0-1ubuntu2.3) ...
Processing triggers for man-db (2.7.5-1) ...
Processing triggers for libc-bin (2.23-0ubuntu9) ...
Setting up python-six (1.10.0-3) ...
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 processing package python-six (--configure):
subprocess installed post-installation script returned error exit status 1
No apport report written because the error message indicates its a followup error from a previous failure.
dpkg: dependency problems prevent configuration of python-dateutil:
python-dateutil depends on python-six (>= 1.5); however:
Package python-six is not configured yet.