tako is a command language and shell for GNU/Linux (and Mac OS, and Windows via Cygwin or MSYS2), based on Python (version 3) and GNU Bash , and forked from xonsh .
tako is not Bash-compatible, but rather is designed to provide an intuitive interface for common shell operations (to reduce time spent looking up how to do things in Bash/sed/awk).
There are three equally valid ways of looking at tako : it is a shell with a sane scripting language, and/or it is Python with extra syntax to make running external commands easier, and/or it is a stripped-down version of xonsh (you can see some of the differences from xonsh here ).