def has_stack(self, stack_name):
        """
        Checks if a CloudFormation stack with given name exists
        :param stack_name: Name or ID of the stack
        :return: True if stack exists. False otherwise
        """
        cf = self.cf_client
        try:
            resp = cf.describe_stacks(StackName=stack_name)
            if len(resp["Stacks"]) != 1:
                return False

            # When you run CreateChangeSet on a a stack that does not exist,
            # CloudFormation will create a stack and set it's status
            # REVIEW_IN_PROGRESS. However this stack is cannot be manipulated
            # by "update" commands. Under this circumstances, we treat like
            # this stack does not exist and call CreateChangeSet will
            # ChangeSetType set to CREATE and not UPDATE.
            stack = resp["Stacks"][0]
            return stack["StackStatus"] != "REVIEW_IN_PROGRESS"

        except botocore.exceptions.ClientError as e:
            # If a stack does not exist, describe_stacks will throw an
            # exception. Unfortunately we don't have a better way than parsing
            # the exception msg to understand the nature of this exception.
            msg = str(e)

            if "Stack with id {0} does not exist".format(stack_name) in msg:
                LOG.debug("Stack with id {0} does not exist".format(
                    stack_name))
                return False
            else:
                # We don't know anything about this exception. Don't handle
                LOG.debug("Unable to get stack details.", exc_info=e)
                raise e
Checks if a CloudFormation stack with given name exists
        :param stack_name: Name or ID of the stack
        :return: True if stack exists. False otherwise