Terminator does not work

I installed terminator and it was working very well, but suddenly It stopped working.

When I add terminator repository, I got this error:

Command:

sudo add-apt-repository ppa:gnome-terminator/ppa

Error:

E: The repository 'http://ppa.launchpad.net/gnome-terminator/ppa/ubuntu bionic Release' does not have a Release file.

and When I ran terminator command in the terminal, I got this error:

File "/usr/bin/terminator", line 123
   except (KeyError,ValueError), ex:
                                ^
SyntaxError: invalid syntax
Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 63, in apport_excepthook
    from apport.fileutils import likely_packaged, get_recent_crashes
  File "/usr/lib/python3/dist-packages/apport/__init__.py", line 5, in <module>
    from apport.report import Report
  File "/usr/lib/python3/dist-packages/apport/report.py", line 30, in <module>
    import apport.fileutils
  File "/usr/lib/python3/dist-packages/apport/fileutils.py", line 23, in <module>
    from apport.packaging_impl import impl as packaging
  File "/usr/lib/python3/dist-packages/apport/packaging_impl.py", line 24, in <module>
    import apt
  File "/usr/lib/python3/dist-packages/apt/__init__.py", line 23, in <module>
    import apt_pkg
ModuleNotFoundError: No module named 'apt_pkg'

Original exception was:
  File "/usr/bin/terminator", line 123
    except (KeyError,ValueError), ex:
                                ^
SyntaxError: invalid syntax

I use python3.7 and Ubuntu18.04

References:

linuste
terminator
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Update

Software and Update:

Here is my software and update the latest status:

enter image description here

Python path:

ubuntu@ubuntu-Z97-D3H:~$ which python3;
/usr/bin/python3
ubuntu@ubuntu-Z97-D3H:~$ which python
/usr/bin/python
ubuntu@ubuntu-Z97-D3H:~$  ls -al $(which python python3)
lrwxrwxrwx 1 root root 24 Dec  9 08:46 /usr/bin/python -> /etc/alternatives/python
lrwxrwxrwx 1 root root  9 Oct 25  2018 /usr/bin/python3 -> python3.6
ubuntu@ubuntu-Z97-D3H:~$  dpkg -l | grep python | grep apt
ii  python-apt-common                          1.6.4                                           all          Python interface to libapt-pkg (locales)
ii  python3-apt                                1.6.4                                           amd64        Python 3 interface to libapt-pkg
ii  python3-aptdaemon                          1.1.1+bzr982-0ubuntu19.1                        all          Python 3 module for the server and client of aptdaemon
ii  python3-aptdaemon.gtk3widgets              1.1.1+bzr982-0ubuntu19.1                        all          Python 3 GTK+ 3 widgets to run an aptdaemon client
ubuntu@ubuntu-Z97-D3H:~$

You should not use PPA to get Terminator installed. You have to remove the problematic PPA with

sudo add-apt-repository -r ppa:gnome-terminator/ppa

and then install the Terminator from universe pocket.

All you need is to enable this pocket and install package from it:

sudo add-apt-repository universe
sudo apt-get update
sudo apt-get install terminator

And then use it as was planned:

$ terminator -v
terminator 1.91

You can now use the instructions provided on this page after the project moved to GitHub:

https://github.com/gnome-terminator/terminator/blob/master/INSTALL.md#source-install

Terminator does not work

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