Help on function download in module cotools.data:

ddoowwnnllooaadd(dir: str = '.', match: str = '.tar.gz', regex: bool = False) -> None
    download:
        Download CORD-19 dataset from ai2's S3 bucket.
    -----------------------------------------------------
    args:
        dir:    Directory to download the data into.
        match:  A string dictating which files to download. Defaults to match
                all tar files.
        regex:  If regex should be used. Otherwise, a `match in x` is used.
    -----------------------------------------------------
    how it works:
        Match all files:                `download('data', match='*')`
        Match only JSON files:          `download('data', match='.json')`
        Match tar files from April 10:  `download('data', match='2020-04-10.*.tar.gz', regex=True)`
