I made https://pip.wtf, which is a "god damn it, I'm doing this myself" alternative for single-file scripts that just need some basic deps. You paste some code into your script and then it installs dependencies to a local directory.
Nice! The only criticism I have of this is needing to figure out the obscure shell quoting rules. But it is pretty easy to follow the DIY spirit and replace the os.system call with subprocess!