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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 extended_arg_patterns(self):
 """Iterator over patterns for positional arguments to be matched This yields the elements of :attr:`args`, extended by their `mode` value """

        for arg in self._arg_iterator(self.args):
            if isinstance(arg, Pattern):
                if arg.mode > self.single:
                    while True:
                        yield arg
                else:
                    yield arg
            else:
                yield arg