About java : Linux-MCP-decompilesh

I’m using Ubuntu and I have the following problem, when I want to decompile Minecraft (with decompile.sh) I get the following error:

SyntaxError: Missing parentheses in call to 'print'. Did you mean print('')?

What is the reason for this?

The shell script assumes that python is Python 2, but on your system it’s Python 3.

If you view the script you will realize it runs one line only, install python2 and edit the script to python2.* (check what python2 you have and replace with * and save and run.