sudo apt-get update 到python3.6时失败!!!
Ign:16 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main amd64 DEP-11 Metadata
Ign:17 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main DEP-11 64x64 Icons
Ign:8 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main amd64 Packages
Ign:11 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main i386 Packages
Ign:12 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main all Packages
Ign:14 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main Translation-en_US
Ign:15 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main Translation-en
Ign:16 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main amd64 DEP-11 Metadata
Ign:17 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main DEP-11 64x64 Icons
Err:8 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main amd64 Packages
403 Forbidden [IP: 91.189.95.83 80]
Ign:11 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main i386 Packages
Ign:12 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main all Packages
Ign:14 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main Translation-en_US
Ign:15 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main Translation-en
Ign:16 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main amd64 DEP-11 Metadata
Ign:17 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main DEP-11 64x64 Icons
Reading package lists... Done
W: The repository 'http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu/dists/xenial/main/binary-amd64/Packages 403 Forbidden [IP: 91.189.95.83 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.
三行代码轻松搞定
sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt update
sudo apt install python3.6