in scripts/bank_deposit.py [0:0]
def query_db(conn, query, first_row=False):
results = []
with conn.cursor() as cur:
cur.execute(query)
for r in cur.fetchall():
row = []
for i, value in enumerate(r):
row.append(value)
results.append(row)
cur.close()
return (results[0] if results else None) if first_row else results