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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 requests(self, code=None, **kwargs):
 """ Retrieve open requests. You can also enter a specific service code argument. {'all': {'requests': 'data'}} {'123': {'requests': 'data'}} """

        if code:
            kwargs['service_code'] = code
        data = self.get('requests', **kwargs)
        return data