1. as suggested in the comments: don't use `sudo pip install` as you will get conflicts with the system package manager sooner or later. Always install python packages via `pip install --user`.
 2. `$HOME/.local/lib/python3.6/site-packages` shouldn't be on `PATH`, it's the directory containing python modules (python source code files), but no executables. You can check the path for user-installed executables with:

 $ python3 -m site --user-base | xargs -I {} echo {}/bin
Most probably it's the `$HOME/.local/bin`. Add this one to `PATH` instead of `site-packages`. In your `.profile`/`.bashrc`/`.bash_profile` (whatever your OS specifies):

 PATH="$HOME/.local/bin:$PATH"
 export PATH

 Notice the `$PATH` instead of `PATH` in the path appending command.
 Now restart the terminal (or source the profile file) and check whether the installed executables are available:

 $ which eb
 $ eb --help
etc.