def create_security_group(self, name, description, vpc_id=None):
        params = {
            'GroupName': name,
            'GroupDescription': description
        }

        if vpc_id is not None:
            params['VpcId'] = vpc_id

        group = self.get_object('CreateSecurityGroup', params,
                                SecurityGroup, verb='POST')
        group.name = name
        group.description = description
        if vpc_id is not None:
            group.vpc_id = vpc_id
        return group
length-byte stream of random data from a seed (in step-byte blocks).
dataset/ETHPy150Open darcyliu/storyboard/boto/ec2/connection.py/EC2Connection.create_security_group--crossover with--dataset/ETHPy150Open ofermend/medicare-demo/socialite/jython/Lib/test/test_zlib.py/genblock