python Django批量导入不重复数据

#coding:utf-8 

import os 
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "www.settings") 

'''
Django 版本大于等于1.7的时候，需要加上下面两句
import django
django.setup()
否则会抛出错误 django.core.exceptions.AppRegistryNotReady: Models aren't loaded yet.
'''
import django
import datetime


if django.VERSION >= (1, 7):#自动判断版本
 django.setup()

from keywork.models import DevData 

f = open('cs.csv')
WorkList = []
next(f) #将文件标记移到下一行
x = y = 0
for line in f:
 parts = line.replace('"','') #将字典中的"替换空
 parts = parts.split(',') #按;对字符串进行切片
 if DevData.objects.filter(serv_id = parts[0],day_id=parts[24]).exists():
  x = x + 1
 else:
  y = y + 1
  WorkList.append(DevData(serv_id=parts[0], serv_state_name=parts[1], acc_nbr=parts[2], user_name=parts[3], acct_code=parts[4], product_id=parts[5],
       mkt_chnl_name=parts[6], mkt_chnl_id=parts[7],mkt_region_name=parts[8], mkt_region_id=parts[9],mkt_grid_name=parts[10],
       sale_man=parts[11],sale_outlets_cd1_name=parts[12], completed_time=parts[13],remove_data=parts[14], user_flag=parts[15],
       pro_flag=parts[16], service_offer_id=parts[17],service_offer_name=parts[18], finish_time=parts[19],staff_name=parts[20],
       staff_code=parts[21],org_name=parts[22],prod_offer_name=parts[23],day_id=parts[24]
       ))
f.close() 
DevData.objects.bulk_create(WorkList)
print "重复数据"+str(x)+"条,成功导入数据"+str(y)+"条"