I created a (quasi) datapackage with two TSV files, and tried exploring with the python package, but I realized that only csv is supported (https://github.com/tryggvib/datapackage/blob/master/datapackage/datapackage.py#L263).
The spec got to beta10, but as I see there's a specification for csv dialects, it's possible to support it?

http://dataprotocols.org/tabular-data-package/
http://dataprotocols.org/csv-dialect/