sudo apt install python3.6-minimal
Reading package lists... Done
Building dependency tree
Reading state information... Done
python3.6-minimal is already the newest version (3.6.6-1~18.04).
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 apt-xapian-index : Depends: python3-xapian (>= 1.4.3-1) but it is not going to be installed
 dh-python : Depends: python3-distutils but it is not going to be installed
 gnome-icon-theme : Depends: gtk-update-icon-cache
 hud : Depends: libdbusmenu-qt5-2 (>= 0.9.3+14.10.20140619) but it is not going to be installed
       Depends: libqt5core5a (>= 5.9.0~beta) but 5.5.1+dfsg-16ubuntu7.5 is to be installed
 libnautilus-extension1a : Depends: libglib2.0-0 (>= 2.51.2) but 2.48.2-0ubuntu4.1 is to be installed
 nautilus : Depends: libexempi3 (>= 2.4.0) but 2.2.2-2ubuntu0.1 is to be installed
            Depends: libglib2.0-0 (>= 2.51.2) but 2.48.2-0ubuntu4.1 is to be installed
            Depends: libgnome-autoar-0-0 (>= 0.2.1) but it is not going to be installed
            Depends: libgnome-desktop-3-17 (>= 3.18.1) but it is not going to be installed
            Depends: libgtk-3-0 (>= 3.22.6) but 3.18.9-1ubuntu3.3 is to be installed
            Depends: libtracker-sparql-2.0-0 (>= 0.10.0) but it is not going to be installed
            Depends: nautilus-data (= 1:3.26.4-0~ubuntu18.04.1) but 1:3.18.4.is.3.14.3-0ubuntu6 is to be installed
 onboard : Depends: onboard-common (< 1.4.1-2ubuntu1.1) but it is not going to be installed
           Depends: onboard-common (>= 1.4.1-2ubuntu1) but it is not going to be installed
           Depends: python3 (>= 3.6~) but 3.5.1-3 is to be installed
           Depends: libhunspell-1.6-0 but it is not going to be installed
           Recommends: onboard-data (>= 1.4.1-2ubuntu1) but 1.2.0-0ubuntu5 is to be installed
 python-apt : Depends: libapt-inst2.0 (>= 1.4~beta3) but 1.2.27 is to be installed
              Depends: libapt-pkg5.0 (>= 1.4~beta3) but 1.2.27 is to be installed
 python3-apt : Depends: python3 (>= 3.6~) but 3.5.1-3 is to be installed
               Depends: libapt-inst2.0 (>= 1.4~beta3) but 1.2.27 is to be installed
               Depends: libapt-pkg5.0 (>= 1.4~beta3) but 1.2.27 is to be installed
 python3-cairo : Depends: python3 (>= 3.6~) but 3.5.1-3 is to be installed
 python3-dbus.mainloop.qt : Depends: python3 (>= 3.6~) but 3.5.1-3 is to be installed
 python3-gdbm : Depends: python3 (>= 3.6.4-1~) but 3.5.1-3 is to be installed
                Depends: libgdbm5 (>= 1.14) but it is not going to be installed
 python3-renderpm : Depends: python3 (>= 3.6~) but 3.5.1-3 is to be installed
 python3-reportlab-accel : Depends: python3 (>= 3.6~) but 3.5.1-3 is to be installed
 ubuntu-session : Depends: gnome-settings-daemon (>= 3.23.3) but it is not going to be installed
                  Depends: gnome-shell (>= 3.24.3-0ubuntu2) but it is not going to be installed
                  Depends: gnome-session-bin (>= 3.28.1-0ubuntu3) but 3.18.1.2-1ubuntu1.16.04.2 is to be installed
                  Depends: gnome-session-common (= 3.28.1-0ubuntu3) but 3.18.1.2-1ubuntu1.16.04.2 is to be installed
                  Depends: xwayland but it is not going to be installed
                  Recommends: gnome-themes-extra but it is not going to be installed
 unity : Depends: libgnome-desktop-3-17 (>= 3.17.92) but it is not going to be installed
         Depends: libgtk-3-0 (>= 3.19.12) but 3.18.9-1ubuntu3.3 is to be installed
         Depends: libsigc++-2.0-0v5 (>= 2.8.0) but 2.6.2-1 is to be installed
         Depends: libunity-core-6.0-9 (= 7.5.0+18.04.20180413-0ubuntu1) but 7.4.5+16.04.20180221-0ubuntu1 is to be installed
         Depends: libunity-protocol-private0 (>= 7.1.4+18.04.20180209.1) but 7.1.4+16.04.20180209.1-0ubuntu1 is to be installed
         Depends: gsettings-ubuntu-schemas (>= 0.0.7+17.10.20170922) but 0.0.5+16.04.20160307-0ubuntu1 is to be installed
         Recommends: unity-scope-calculator but it is not going to be installed
         Recommends: unity-scope-texdoc but it is not going to be installed
         Recommends: unity-scope-manpages but it is not going to be installed
         Recommends: unity-scope-devhelp but it is not going to be installed
         Recommends: unity-session but it is not going to be installed
 unity-settings-daemon : Depends: libfcitx-gclient1 (>= 1:4.2.9.5) but it is not going to be installed
                         Depends: libfontconfig1 (>= 2.12) but 2.11.94-0ubuntu1.1 is to be installed
                         Depends: libgnome-desktop-3-17 (>= 3.17.92) but it is not going to be installed
                         Depends: gsettings-ubuntu-schemas (>= 0.0.7+17.10.20170922) but 0.0.5+16.04.20160307-0ubuntu1 is to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).