> dpkg -i python3_3.5.1-3_amd64.deb
dpkg: regarding python3_3.5.1-3_amd64.deb containing python3, pre-dependency problem:
 python3 pre-depends on python3-minimal (= 3.5.1-3)
  python3-minimal latest configured version is 3.4.0-0ubuntu2.

dpkg: error processing archive python3_3.5.1-3_amd64.deb (--install):
 pre-dependency problem - not installing python3
Errors were encountered while processing:
 python3_3.5.1-3_amd64.deb
(root@ams-db1)-(/tmp)
> apt-cache policy python3-minimal
python3-minimal:
  Installed: 3.5.1-3
  Candidate: 3.5.1-3
  Version table:
 *** 3.5.1-3 0
       1001 http://mirrors.service.networklayer.com/ubuntu/ xenial/main amd64 Packages
        100 /var/lib/dpkg/status