some error in ubuntu when installing kivy

Err:8 http://ppa.launchpad.net/kivy-team/kivy/ubuntu focal Release
404 Not Found [IP: 91.189.95.83 80]
Reading package lists… Done
E: The repository ‘http://ppa.launchpad.net/kivy-team/kivy/ubuntu focal 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.

安装kivy后,执行"sudo apt update",发生了一些错误.

解决这个问题:
open this file:

changes some options:

可能您使用文件编辑器打开此文件,像这样的形式:

同样地,用 ”＃”注释那三行,ok.

再次执行"sudo apt update":
over!! I 希望对您有帮助!