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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 _write_iterate(self, values):
 """Generates the lines for a single pass through the group."""

        result = []
        for key in self.order:
            result.append(self.lines[key].write(values))

        if len(result) > 1:
            return result
        else:
            return result[0]