tom@Tom-Ubuntu:~$ sudo apt upgrade
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
  libpython3-dev libpython3-stdlib libtalloc2 libtdb1 python3 python3-dev python3-minimal python3-talloc python3-tdb
0 upgraded, 0 newly installed, 0 to remove and 9 not upgraded.
tom@Tom-Ubuntu:~$ sudo apt install python3
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages were automatically installed and are no longer required:
  apg base58 cython3 gir1.2-gst-plugins-base-1.0 gir1.2-rb-3.0 gnome-control-center-faces gnome-online-accounts hplip-data libarmadillo-dev libarpack2-dev libblas-dev libblosc-dev libcfitsio-dev
  libcfitsio-doc libcharls-dev libcolord-gtk1 libdav1d-dev libde265-dev libdmapsharing-3.0-2 libfreexl-dev libfyba-dev libgdal-dev libgeos-dev libgeotiff-dev libgl2ps-dev libgpod-common libgpod4
  libgsound0 libgssdp-1.2-0 libgupnp-1.2-1 libgupnp-av-1.0-2 libgupnp-dlna-2.0-3 libheif-dev libhpmud0 libjson-c-dev libjsoncpp-dev libkml-dev libkmlconvenience1 libkmlregionator1 libkmlxsd1
  liblapack-dev libldb2 liblz4-dev libminizip-dev libnetcdf-c++4 libnetcdf-cxx-legacy-dev libobs0 libogdi-dev libogg-dev libopenjp2-7-dev libpoppler-dev libpoppler-private-dev libpython3.9-dev
  libqhull-dev libqhull8.0 libqhullcpp8.0 librttopo-dev librygel-core-2.6-2 librygel-db-2.6-2 librygel-renderer-2.6-2 librygel-server-2.6-2 libsane-hpaio libsgutils2-2 libspatialite-dev libsuperlu-dev
  libtalloc2 libtevent0 libtheora-dev liburiparser-dev libvtk7-java libvtk7-jni libvtk7.1p libvtk7.1p-qt libwbclient0 libwebp-dev mobile-broadband-provider-info network-manager-gnome obs-plugins
  power-profiles-daemon printer-driver-hpcups printer-driver-postscript-hp python3-autobahn python3-automat python3-base58 python3-cbor python3-cffi python3-constantly python3-ecdsa python3-flatbuffers
  python3-hamcrest python3-hyperlink python3-incremental python3-macaroonbakery python3-mako python3-mnemonic python3-mpi4py python3-msgpack python3-passlib python3-png python3-protobuf
  python3-pycparser python3-pymacaroons python3-pyqrcode python3-renderpm python3-reportlab python3-reportlab-accel python3-rfc3339 python3-service-identity python3-snappy python3-sortedcontainers
  python3-talloc python3-tdb python3-trie python3-twisted python3-twisted-bin python3-txaio python3-u-msgpack python3-ubjson python3-ujson python3-wsaccel python3-zope.interface python3.9-dev rygel
  samba-common tcl-vtk7 vtk7
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
  libpython3-dev libpython3-stdlib libtalloc2 libtdb1 python3-dev python3-minimal python3-talloc python3-tdb
Suggested packages:
  python3-doc python3-venv
The following packages will be REMOVED:
  gnome-control-center gobject-introspection gvfs-backends hplip libgirepository1.0-dev libsmbclient libvtk7-dev obs-studio python3-ldb python3-samba python3-uno python3-vtk7 rhythmbox-plugins
  samba-common-bin samba-dsdb-modules samba-libs ubuntu-desktop ubuntu-desktop-minimal vlc-plugin-samba winbind
The following packages will be upgraded:
  libpython3-dev libpython3-stdlib libtalloc2 libtdb1 python3 python3-dev python3-minimal python3-talloc python3-tdb
9 upgraded, 0 newly installed, 20 to remove and 0 not upgraded.
Need to get 189 kB of archives.
After this operation, 122 MB disk space will be freed.
Do you want to continue? [Y/n] n
Abort.