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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 get_configured_providers(self):
        '''
        Return the configured providers
        '''
        providers = set()
        for alias, drivers in six.iteritems(self.opts['providers']):
            if len(drivers) > 1:
                for driver in drivers:
                    providers.add('{0}:{1}'.format(alias, driver))
                continue
            providers.add(alias)
        return providers