<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def add_arguments(self, parser):
 """Unpack self.arguments for parser.add_arguments."""

        parser.add_argument('app_label', nargs='*')
        for argument in self.arguments:
            parser.add_argument(*argument.split(' '), **self.arguments[argument])