def parse_upload(dataset, id):
upload = Upload.by_id(id)
if upload is None:
return None, None
fh = open(upload.path, 'rb')
fn, ext = os.path.splitext(upload.filename)
ext = ext[1:] if ext else None
table_set = AnyTableSet.from_fileobj(fh,
mimetype=upload.mimetype,
extension=ext[1:])
return upload, table_set.tables[0]
