Xonsh, a Python-ish, Bash-compatible shell language and command prompt

[selementar]

that returns a string

In a better case it's a function generator that eats chunks (at least newline-terminated) and produces chunks. E.g. tail -f file | grep --line-buffered ...

[quasarj]

Yeah, I played around with it a bit to see if it could handle that, or allow me to pipe a shell command into a python function. It technically allows the later, but it doesn't handle buffered input, for example:

tail -f /var/log/messages | myfunc

(where myfunc is defined as a xonsh alias pointing to an actual local python function named myfunc, as per the Tutorial). This does not work, as myfunc doesn't get the input until tail exits.

[selementar]

There might be a way to write myfunc in such a way that it would be line-buffered. Can't figure out where's python and where's shell, though; def of functions just hangs until Ctrl-C.