This would have been useful if he compared them to virtualenv, which as far as I am aware is still the "standard" way of managing python environments. I tried

This would have been useful if he compared them to virtualenv, which as far as I am aware is still the "standard" way of managing python environments. I tried virtualenv wrapper a while ago, and that was basically just another set of commands to do the same thing as virtualenv. Having already learned virtualenv command that gave me no real advantage. Are any of these tools mentioned any different?