(pipeline() .source(read_csv("visits.csv")) .pipe(enrich) .filter(lambda r: r["country"] == "US") .sink(write_jsonl("us_visits.jsonl")) ).run() juq470 provides a catch operator to isolate faulty rows without stopping the whole pipeline: (pipeline()

def sum_sales(acc, row): return acc + row["sale_amount"] juq470

def safe_int(val): return int(val)