Install iperl - no error messages; but it seems not be installed

I tried to install wiper using this link:](

I got several install complete messages and no error messages. These failed:

iperl console
iperl notebook

I got “command not found”. I assumed this was a path issue. My $PATH is:

This is the correct setting for jupyter itself. But
sudo find / -type f -name iperl -print
did not find anything. I am confused by the fact that I got so many “install complete” messages, but not iperl (apparently). Can somebody give e me some guidance?