def displayhook(arg):
        """Python's pretty-printer display hook.

           This function was adapted from:

            http://www.python.org/dev/peps/pep-0217/

        """
        if arg is not None:
            __builtin__._ = None
            print stringify_func(arg)
            __builtin__._ = arg

    def pretty_print(arg, p=None, cycle=None):
        """pretty printer that accepts pretty's arg format."""
        out = stringify_func(arg)

        if '\n' in out:
            print

        print out

    def _displayhook(arg):
        """Python's pretty-printer display hook.

           This function was adapted from:

            http://www.python.org/dev/peps/pep-0217/

        """
        if arg is not None:
            builtins._ = None
            print(stringify_func(arg, **settings))
            builtins._ = arg

    def _result_display(self, arg):
        """IPython's pretty-printer display hook, for use in IPython 0.10

           This function was adapted from:

            ipython/IPython/hooks.py:155

        """
        if self.rc.pprint:
            out = stringify_func(arg)

            if '\n' in out:
                print

            print out
        else:
            print repr(arg)

 def _pretty_print(arg, p, cycle):
     """caller for pretty, for use in IPython 0.11"""
     p.text(stringify_func(arg))

 def _print_plain(arg, p, cycle):
     """caller for pretty, for use in IPython 0.11"""
     if _can_print_latex(arg):
         p.text(stringify_func(arg))
     else:
         p.text(IPython.lib.pretty.pretty(arg))