|filenames||Files to parse.||list of string (required)|
|accessor||The accessor to use||string|
|regex||The split regular expression (e.g. a comma)||string (required)|
|columns||If the first row is not the headers, this arg must provide a list of column names for each value.||list of string|
|first_row_is_headers||A bool indicating if we should get column names from the first row.||bool|
|count||Only split into this many columns if possible.||int|
Parses files by splitting lines into records.