Perform a scan of DynamoDB.  This version is currently punting
        and expecting you to provide a full and correct JSON body
        which is passed as is to DynamoDB.

        :type table_name: str
        :param table_name: The name of the table to scan.

        :type scan_filter: dict
        :param scan_filter: A Python version of the
            ScanFilter data structure.

        :type attributes_to_get: list
        :param attributes_to_get: A list of attribute names.
            If supplied, only the specified attribute names will
            be returned.  Otherwise, all attributes will be returned.

        :type limit: int
        :param limit: The maximum number of items to return.

        :type count: bool
        :param count: If True, Amazon DynamoDB returns a total
            number of items for the Scan operation, even if the
            operation has no matching items for the assigned filter.

        :type exclusive_start_key: list or tuple
        :param exclusive_start_key: Primary key of the item from
            which to continue an earlier query.  This would be
            provided as the LastEvaluatedKey in that query.

def scan(self, table_name, scan_filter=None,
             attributes_to_get=None, limit=None,
             count=False, exclusive_start_key=None,
             object_hook=None):
        """
        Perform a scan of DynamoDB.  This version is currently punting
        and expecting you to provide a full and correct JSON body
        which is passed as is to DynamoDB.

        :type table_name: str
        :param table_name: The name of the table to scan.

        :type scan_filter: dict
        :param scan_filter: A Python version of the
            ScanFilter data structure.

        :type attributes_to_get: list
        :param attributes_to_get: A list of attribute names.
            If supplied, only the specified attribute names will
            be returned.  Otherwise, all attributes will be returned.

        :type limit: int
        :param limit: The maximum number of items to return.

        :type count: bool
        :param count: If True, Amazon DynamoDB returns a total
            number of items for the Scan operation, even if the
            operation has no matching items for the assigned filter.

        :type exclusive_start_key: list or tuple
        :param exclusive_start_key: Primary key of the item from
            which to continue an earlier query.  This would be
            provided as the LastEvaluatedKey in that query.
        """
        data = {'TableName': table_name}
        if scan_filter:
            data['ScanFilter'] = scan_filter
        if attributes_to_get:
            data['AttributesToGet'] = attributes_to_get
        if limit:
            data['Limit'] = limit
        if count:
            data['Count'] = True
        if exclusive_start_key:
            data['ExclusiveStartKey'] = exclusive_start_key
        json_input = json.dumps(data)
        return self.make_request('Scan', json_input, object_hook=object_hook)