W: The repository 'http://ppa.launchpad.net/deadsnakes/ppa/ubuntu impish 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/deadsnakes/ppa/ubuntu/dists/impish/main/binary-amd64/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
description
sudo apt-get install software-properties-common
sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt-get install python3.7
sudo apt-get update
os information
Operating System: Ubuntu 18.04.5 LTS Kernel Version: 4.15.0-1102-aws OSType: linux Architecture: x86_64