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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_access_key_id(self):
 """ Returns the access key for an instance of Blob Store service from environment inspection. """

        if 'VCAP_SERVICES' in os.environ:
            services = json.loads(os.getenv('VCAP_SERVICES'))
            return services['predix-blobstore'][0]['credentials']['access_key_id']
        else:
            return predix.config.get_env_value(self, 'access_key_id')