# -*- coding: utf-8 -*- import math import re import csv import repr def ean_checksum(eancode): """returns the checksum of an ean string of length 13, returns -1 if the string has the wrong length""" if len(eancode) != 13: return -1 oddsum=0 evensum=0 total=0 eanvalue=eancode reversevalue = eanvalue[::-1] finalean=reversevalue[1:] for i in range(len(finalean)): if i % 2 == 0: oddsum += int(finalean[i]) else: evensum += int(finalean[i]) total=(oddsum * 3) + evensum check = int(10 - math.ceil(total % 10.0)) %10 return check def sanitize_ean13(csvfile): reader = csv.reader(file(csvfile,‘rb‘)) writer = csv.writer(file(‘C:/Users/Administrator/Desktop/1.csv‘,‘wb‘)) for id,ean13 in reader: if not ean13: return "0000000000000" ean13 = str(ean13) ean13 = ‘0‘ * (9-len(ean13)) + ean13 ean13 = ‘042‘ + ean13 ean13 = re.sub("[A-Za-z]","0",ean13); ean13 = re.sub("[^0-9]","",ean13); ean13 = ean13[:13] if len(ean13) < 13: ean13 = ean13 + ‘0‘ * (13-len(ean13)) s=ean13[:-1] + str(ean_checksum(ean13)) writer.writerow([id,s]) sanitize_ean13(‘C:/Users/Administrator/Desktop/res.partner.csv‘)
时间: 2024-08-10 19:18:40