Here I am again, trying to run multiple Pythons, with multiple libraries, without them tripping over each other. Many hackers have gone down this path and become lost, I expect I will fare no better, but I've stumbled upon a scheme which works for me, whether running Python on a Macintosh, in a Linux server, or even on Windows.
This weekend I explored the Fish Shell (a modern interactive Unix shell). I've been dabbling with it for a while, particularly enjoying its interactive features: command suggestions, the TAB-completion menu, the fact that it Just Works™ out of the box, and understands commands and options by groking their man-pages.
I've wanted to port a few of my bash functions which I've been missing: my ssh-pass to load SSH keys onto the Agent's keyring with passphrase supplied by pass, and an alias to get my 1password passphrase from pass as well. Also some directory navigation shortcuts that I've used since my university days. I figured these would be a good introduction to how fish's scripting works, and I was right