​S3 Select is an S3 feature that allows you to operate on JSON, CSV, and Parquet files in a row-based manner using SQL syntax. QUILT features experimental support for S3 Select queries as part of the Bucket interface:
import quilt3
b = quilt3.Bucket("s3://alpha-quilt-example")
b.select("foo/bar.csv","SELECT * FROM S3Object LIMIT 5")