def spawn_processes(self):
        for port in self.ports_to_spawn:
            process = self.spawn_process(port)
            process.start()
            self.children.append(process)
Parses format string.
dataset/ETHPy150Open gmr/tinman/tinman/controller.py/Controller.spawn_processes--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/mapreduce/file_format_parser.py/parse