Both packages duplicity and python-gi are no longer available in the repositories. I'm using Ubuntu 16.04 LTS. Can anyone suggest a solution? Thank you in advance.
~$ sudo apt-get install duplicity python-gi
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package python-gi is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
Package duplicity is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'duplicity' has no installation candidate
E: Package 'python-gi' has no installation candidate