xonsh.procs

xonsh.procs.pipelines	Command pipeline tools.
xonsh.procs.posix	Interface for running subprocess-mode commands on posix systems.
xonsh.procs.proxies	Interface for running Python functions as subprocess-mode commands.
xonsh.procs.readers	File handle readers and related tools.
xonsh.procs.specs	Subprocess specification and related utilities.