Generic reader of line files.

def _read(filepath_or_buffer: FilePathOrBuffer, kwds):
    """Generic reader of line files."""
    encoding = kwds.get('encoding', None)
    if encoding is not None:
        encoding = re.sub('_', '-', encoding).lower()
        kwds['encoding'] = encoding

    compression = kwds.get('compression', 'infer')
    compression = _infer_compression(filepath_or_buffer, compression)

    # TODO: get_filepath_or_buffer could return
    # Union[FilePathOrBuffer, s3fs.S3File, gcsfs.GCSFile]
    # though mypy handling of conditional imports is difficult.
    # See https://github.com/python/mypy/issues/1297
    fp_or_buf, _, compression, should_close = get_filepath_or_buffer(
        filepath_or_buffer, encoding, compression)
    kwds['compression'] = compression

    if kwds.get('date_parser', None) is not None:
        if isinstance(kwds['parse_dates'], bool):
            kwds['parse_dates'] = True

    # Extract some of the arguments (pass chunksize on).
    iterator = kwds.get('iterator', False)
    chunksize = _validate_integer('chunksize', kwds.get('chunksize', None), 1)
    nrows = kwds.get('nrows', None)

    # Check for duplicates in names.
    _validate_names(kwds.get("names", None))

    # Create the parser.
    parser = TextFileReader(fp_or_buf, **kwds)

    if chunksize or iterator:
        return parser

    try:
        data = parser.read(nrows)
    finally:
        parser.close()

    if should_close:
        try:
            fp_or_buf.close()
        except ValueError:
            pass

    return data