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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def update_args(self, args):
 """Update config dictionary with parsed args, as resolved by argparse. Only root positional arguments that already exist will overridden. Args: args (namespace):
 args parsed by argparse """


        for arg in vars(args):
            if self.get(arg) and getattr(args, arg) is not None:
                self._config[self.root_section][arg] = getattr(args, arg)