I am using Ubuntu 18.04. I checked the following link:installing python3.5
I am trying to install python3.5.
$python --version
Python 2.7.15+ (envsp) @lc2530hz:~
When I used the command to add repository I got error messages:
$ sudo add-apt-repository ppa:deadsnakes/ppa
: :
Ign:36 http://download.virtualbox.org/virtualbox/debian 18.04 InRelease Err:37 http://download.virtualbox.org/virtualbox/debian 18.04 Release
404 Not Found [IP: 104.73.164.84 80] Reading package lists... Done E: The repository 'http://download.virtualbox.org/virtualbox/debian 18.04 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. (envsp) zulfi@lc2530hz:~$
Somebody please guide me how to solve this problem.
Zulfi.
