def get_limits(self):
        """
        Return all known limits for this service, as a dict of their names
        to :py:class:`~.AwsLimit` objects.

        :returns: dict of limit names to :py:class:`~.AwsLimit` objects
        :rtype: dict
        """
        self.connect()
        region_name = self.conn._client_config.region_name
        if self.limits != {}:
            return self.limits
        limits = {}

        limits['Tables Per Region'] = AwsLimit(
            'Tables Per Region',
            self,
            256,
            self.warning_threshold,
            self.critical_threshold,
            limit_type='AWS::DynamoDB::Table',
        )

        limits['Account Max Write Capacity Units'] = AwsLimit(
            'Account Max Write Capacity Units',
            self,
            80000 if region_name == 'us-east-1' else 20000,
            self.warning_threshold,
            self.critical_threshold,
            limit_type='AWS::DynamoDB::Table', )

        limits['Table Max Write Capacity Units'] = AwsLimit(
            'Table Max Write Capacity Units',
            self,
            40000 if region_name == 'us-east-1' else 10000,
            self.warning_threshold,
            self.critical_threshold,
            limit_type='AWS::DynamoDB::Table',
        )

        limits['Account Max Read Capacity Units'] = AwsLimit(
            'Account Max Read Capacity Units',
            self,
            80000 if region_name == 'us-east-1' else 20000,
            self.warning_threshold,
            self.critical_threshold,
            limit_type='AWS::DynamoDB::Table',
        )

        limits['Table Max Read Capacity Units'] = AwsLimit(
            'Table Max Read Capacity Units',
            self,
            40000 if region_name == 'us-east-1' else 10000,
            self.warning_threshold,
            self.critical_threshold,
            limit_type='AWS::DynamoDB::Table',
        )

        limits['Global Secondary Indexes'] = AwsLimit(
            'Global Secondary Indexes',
            self,
            20,
            self.warning_threshold,
            self.critical_threshold,
            limit_type='AWS::DynamoDB::Table',
        )

        limits['Local Secondary Indexes'] = AwsLimit(
            'Local Secondary Indexes',
            self,
            5,
            self.warning_threshold,
            self.critical_threshold,
            limit_type='AWS::DynamoDB::Table',
        )

        self.limits = limits
        return limits
Return all known limits for this service, as a dict of their names
        to :py:class:`~.AwsLimit` objects.

        :returns: dict of limit names to :py:class:`~.AwsLimit` objects
        :rtype: dict