def pipe(self):
self._add(Pipe(self, '<STR_LIT:|>'))<EOL>return self<EOL>
Pipe commands in Sultan.

Usage::

    # runs: 'cat /var/log/foobar.log | grep 192.168.1.1'
    s = Sultan()
    s.cat("/var/log/foobar.log").pipe().grep("192.168.1.1").run()