主要解决安装过程报错，有完整的安装过程。
python-3.6/ubuntu/dists/xenial/main/binary-amd64/Packages 403
Err:7 http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial/main amd64 Packages 403 Forbidden [IP: 91.189.95.83 80]
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.
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/jonathonf/python-3.6/ubuntu xenial Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
