text: import csv
  
  abtReader = csv.DictReader(open("Abt.csv","rU"))
  buyReader = csv.DictReader(open("Buy.csv","rU"))
  gtLines = csv.DictReader(open("abt_buy_perfectMapping.csv","rU"))
  gtBuyMap = {}
  gtAbtMap = {}
  abtAr = []
  buyAr = []
  
  for r in abtReader:
      abtAr.append(r)
  
  for r in buyReader:
      buyAr.append(r)
  
  for r in gtLines:
      gtAbtMap[r["idAbt"]] = r["idBuy"]
      gtBuyMap[r["idBuy"]] = r["idAbt"]
  