Failed to launch "Terminal"

Question

I am using Ubuntu 18.04 but I cannot open the terminal. when i want to open the terminal i face a notification that is given below . please help me I cannot install any other apps

Solution

I solve this problem by installing xterm from software, and running /usr/bin/gnome-terminal. This gave me an error I hadn't seen before, which was that my python installation was not as expected. I fixed the python installation and everything works again.

The python issue was that I was trying to use a python version manager, but gnome-terminal was looking for the binary python3 in /usr/bin. I had disabled that binary by renaming it to old_python3. I renamed it again to python3 and everything worked.

Comments

[FourOhFour]

What terminal application are you trying to open? What notification appears? Are you able to open another terminal emulator program?

[Josef Klimuk]

Did you try ctrl+alt+t?

[Nmath]

related: askubuntu.com/questions/780626/terminal-wont-lauch-ubuntu-16‌​-04/…

[24601]

Perhaps complete your answer by adding information about how you fixed the python installation in the event others face the same issue?

[steel]

@Graham updated.

[testuser]

I am also facing the same problem after installing python 3.7.0. @steel, Could you explain a bit more -- A binary I had moved. Which binary had you moved from which location to which location and also which binary?

[steel]

@Johir I added the details to the answer, but it was specifically looking for the python3 binary.