My cousin's a core contrib on [xonsh](https://xonsh.org https://xonsh.org) which is a posix-compliant python shell. I remember him cackling about making his env

My cousin's a core contrib on [xonsh](https://xonsh.org https://xonsh.org) which is a posix-compliant python shell. I remember him cackling about making his env completely unusable to anyone else in the world (while giving himself amazing powers)...