def postOptions(self):
        if 'port' not in self:
            self['port'] = 8080
        if 'element' not in self:
            raise UsageError("Specify a class name to --element")
Find reference cycles
dataset/ETHPy150Open twisted/nevow/nevow/_widget_plugin.py/Options.postOptions--crossover with--dataset/ETHPy150Open powerline/powerline/powerline/lib/debug.py/print_cycles