'Show available options / modules'

def do_show(self, line):

    (key, value, pairs) = self.parseline(line)
    if (not key):
        self.help_show()
        return False
    method = 'show_{}'.format(key)
    if ((method in self.showcommands) and hasattr(self, method)):
        func = getattr(self, method)
        func()
