我做了什么：
sudo apt-get remove python3
我得到的回应是：
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
bicyclerepair ca-certificates-mono cli-common dc extlinux gedit-common
gir1.2-appindicator3-0.1 gir1.2-gmenu-3.0 gir1.2-grilo-0.2 gir1.2-gudev-1.0
gir1.2-mediaart-2.0 gir1.2-rb-3.0 gir1.2-secret-1 gir1.2-tracker-1.0
gir1.2-udisks-2.0 guile-2.0-libs intel-gpu-tools kdesudo libandroid-properties1
libdbus-glib2.0-cil libdbus2.0-cil libgc1c2 libgconf2.0-cil libgdiplus
libgkeyfile1.0-cil libglib2.0-cil libgnome-keyring1.0-cil libgpod-common libgpod4
libgtk2.0-cil libhud2 libjs-sphinxdoc libjs-underscore libmessaging-menu0
libmono-accessibility4.0-cil libmono-addins0.2-cil libmono-cairo4.0-cil
libmono-corlib4.5-cil libmono-data-tds4.0-cil libmono-i18n-west4.0-cil
libmono-i18n4.0-cil libmono-ldap4.0-cil libmono-posix4.0-cil
libmono-security4.0-cil libmono-sharpzip4.84-cil libmono-sqlite4.0-cil
libmono-system-componentmodel-dataannotations4.0-cil
libmono-system-configuration4.0-cil libmono-system-core4.0-cil
libmono-system-data4.0-cil libmono-system-design4.0-cil
libmono-system-drawing4.0-cil …