<Expression>SELECT s.synonyms from s3object s WHERE 'whatever' IN s.synonyms</Expression>
    <ExpressionType>SQL</ExpressionType>
    <InputSerialization>
        <CompressionType>NONE</CompressionType>
        <JSON>
            <Type>DOCUMENT</Type>
        </JSON>
    </InputSerialization>
    <OutputSerialization>
        <CSV>
	   <QuoteCharacter>"</QuoteCharacter>
        </CSV>
    </OutputSerialization>

	default:
		return errInvalidCompressionFormat(fmt.Errorf("invalid compression format '%v'", s))
	}

	*c = parsedType
	return nil
}

// InputSerialization - represents elements inside <InputSerialization/> in request XML.
type InputSerialization struct {
	CompressionType CompressionType    `xml:"CompressionType"`
	CSVArgs         csv.ReaderArgs     `xml:"CSV"`
	JSONArgs        json.ReaderArgs    `xml:"JSON"`

	defaultQuoteCharacter       = `"`
	defaultQuoteEscapeCharacter = `"`
	defaultCommentCharacter     = "#"

	asneeded = "asneeded"
)

// ReaderArgs - represents elements inside <InputSerialization><CSV> in request XML.
type ReaderArgs struct {
	FileHeaderInfo             string `xml:"FileHeaderInfo"`
	RecordDelimiter            string `xml:"RecordDelimiter"`
	FieldDelimiter             string `xml:"FieldDelimiter"`

r = s3.select_object_content(
    Bucket='mycsvbucket',
    Key='sampledata/TotalPopulation.csv.gz',
    ExpressionType='SQL',
    Expression="select * from s3object s where s.Location like '%United States%'",
    InputSerialization={
        'CSV': {
            "FileHeaderInfo": "USE",
        },
        'CompressionType': 'GZIP',
    },
    OutputSerialization={'CSV': {}},
)

for event in r['Payload']: