使用django的数据库接口导入csdn数据库

没什么技术含量，直接贴代码：

#coding = utf8
from csdn.models import csdnuser
#except:
#    print u'没有开启django shell'
    
def d():
    source = open('E:\\sync\\docments\\csdn.sql','r')
    
    i = 0
    
    while True:
        all_temp = source.readline()
        if len(all_temp) == 0:
            break
        try:
            temp = all_temp.replace("'","''").decode('gb18030').split()
            user_temp = csdnuser(username = temp[0], userpass = temp[2], useremail = temp[4])
        except:
            user_temp = csdnuser(username = u'qtsharp',userpass = u'      ',useremail = u'qtsharp@qq.com')
            print 'wrong: %s\n' %i
            print all_temp

        user_temp.save()
        n = i + 1
        if n>=10000 and n%10000==0:
            print u'已导入%s万个' % (n/10000)
        i += 1
        
    print u'导入完成，共导入%s个。' %n
    source.close()

发现了一个很严重的问题，内存占用一直很高，而且不断在长，应该怎样及时释放内存呢？

暂时想不到好的办法，先改成下面这样，然后设定处理数量，分段进行。

#coding = utf8
try:
    from csdn.models import csdnuser
except:
    print u'没有开启django shell'
    
    
file_path = 'E:\\sync\\docments\\csdn.sql'

    
#跳过num行
def pass_lines(num,source):
    for n in range(num):
        source.readline()

#主函数
def d(begin_num,limit_num):
    #设定参数
    i = begin_num
    limit = limit_num
    #初始化
    source = open(file_path,'r')
    length = len(source.readlines())
    source.close()
    if limit > length:
        limit = length
    #开始读取
    source = open(file_path,'r')
    pass_lines(i,source) #跳过i行
    #数据写入循环    
    while i<limit:
        all_temp = source.readline()
        try:
            temp = all_temp.decode('gb18030').split()
            user_temp = csdnuser(username = temp[0], userpass = temp[2], useremail = temp[4])
        except:
            user_temp = csdnuser(username = u'qtsharp',userpass = u' ',useremail = u'qtsharp@qq.com') print 'wrong: %s\n' %i print all_temp
        #提交修改
         user_temp.save()
        #进度提示
         n = i + 1
        if n>=10000 and n%10000==0:
            print u'已导入%s万个' % (n/10000)
        i += 1
        
    print u'导入完成，共导入%s个' %(limit_num-begin_num)
    source.close()