def does_address_exist(self, parameters):
    try:
      conn = self.open_connection(parameters)
      elastic_ip = parameters[self.PARAM_STATIC_IP]
      conn.get_all_addresses(elastic_ip)
      AppScaleLogger.log('Elastic IP {0} can be used for this AppScale ' \
        'deployment.'.format(elastic_ip))
      return True
    except boto.exception.EC2ResponseError:
      AppScaleLogger.log('Elastic IP {0} does not exist.'.format(elastic_ip))
      return False
Queries Amazon EC2 to see if the specified Elastic IP address has been
dataset/ETHPy150Open AppScale/appscale-tools/lib/agents/ec2_agent.py/EC2Agent.does_address_exist