'Execute code within a restricted environment.
Similar to the r_exec() method, but the code will be granted access
to restricted versions of the standard I/O streams sys.stdin,
sys.stderr, and sys.stdout.
The code parameter must either be a string containing one or more
lines of Python code, or a compiled code object, which will be
executed in the restricted environment\'s __main__ module.'

def s_exec(self, *args):

    return self.s_apply(self.r_exec, args)
