@transform( liverTestesVenn, suffix(".venn"), ".venn.load" )
def loadLiverTestesVenn(infile, outfile):
    header = "category,intervals"
    statement = '''cat %(infile)s | python %(scriptsdir)s/csv2db.py
                      --database=%(database)s
                      --table=liver_testes_venn
                      --header=%(header)s
                   > %(outfile)s '''
    P.run()
    
############################################################
Shorthand for foo.distinct().count(); computing the number of unique
dataset/ETHPy150Open CGATOxford/cgat/obsolete/pipeline_proj007.py/loadLiverTestesVenn--crossover with--dataset/ETHPy150Open cloudera/ibis/ibis/expr/api.py/nunique