def print_alias_help(self):
        """Print the alias part of the help."""
        if not self.aliases:
            return

        lines = []
        classdict = {}
        for cls in self.classes:
            # include all parents (up to, but excluding Configurable) in available names
            for c in cls.mro()[:-3]:
                classdict[c.__name__] = c

        for alias, longname in self.aliases.iteritems():
            classname, traitname = longname.split('.',1)
            cls = classdict[classname]

            trait = cls.class_traits(config=True)[traitname]
            help = cls.class_get_trait_help(trait).splitlines()
            # reformat first line
            help[0] = help[0].replace(longname, alias) + ' (%s)'%longname
            if len(alias) == 1:
                help[0] = help[0].replace('--%s='%alias, '-%s '%alias)
            lines.extend(help)
        # lines.append('')
        print os.linesep.join(lines)
Print the alias part of the help.