手头两个csv表格（样本的内容贴在最下面），一大一小，大的有将近7万行，小的4千多行，需要找出其中大文件ic.csv的第6列中包含小文件ga.csv的第2列值的行。
我自己尝试写了如下代码：

file0 = 'ic.csv'
file1 = 'ga.csv'

ic = open(file0)
ga = open(file1)
count_ga = 0
for ga_line in ga:
    count_ic = 0
    #获取GA第2列的值
    ga_str  = ga_line.split(',')[1]
    for ic_line in ic:
        #获取IC第6列的值
        ic_str = ic_line.split(',')[5]
        #如果IC第6列包含GA第2列中的值，则打印出各自的行号
        if ga_str in ic_str:
            print('GA第%d行与IC第%d行匹配'%(count_ga,count_ic))
            continue
        count_ic += 1            
    count_ga += 1

运行上述代码只有这一条结果，不知道哪里出问题了，结果如下：

GA第0行与IC第0行匹配

将代码中的continue改成break后的结果如下：

GA第0行与IC第0行匹配
GA第1行与IC第8行匹配
GA第2行与IC第0行匹配
GA第3行与IC第0行匹配
GA第4行与IC第0行匹配
GA第5行与IC第0行匹配
GA第6行与IC第0行匹配
GA第7行与IC第0行匹配
GA第8行与IC第0行匹配
GA第9行与IC第0行匹配

ga.csv内容：

sdfsk,网站域名,skdf,skdf,skdf,skdf,skdf,skdf,skdf,skdf,skdf
sdfsk,bmyxiao.com;,skdf,skdf,skdf,skdf,skdf,skdf,skdf,skdf,skdf
sdfsk,xpjoyu.com;,skdf,skdf,skdf,skdf,skdf,skdf,skdf,skdf,skdf
sdfsk,,skdf,skdf,skdf,skdf,skdf,skdf,skdf,skdf,skdf
sdfsk,bwp.com;,skdf,skdf,skdf,skdf,skdf,skdf,skdf,skdf,skdf
sdfsk,cscai.com;,skdf,skdf,skdf,skdf,skdf,skdf,skdf,skdf,skdf
sdfsk,,skdf,skdf,skdf,skdf,skdf,skdf,skdf,skdf,skdf
sdfsk,jodu.com;,skdf,skdf,skdf,skdf,skdf,skdf,skdf,skdf,skdf
sdfsk,csd168.com;,skdf,skdf,skdf,skdf,skdf,skdf,skdf,skdf,skdf
sdfsk,hnpx.com;,skdf,skdf,skdf,skdf,skdf,skdf,skdf,skdf,skdf

ic.csv内容：

序号,skdlsldjfl,skdfjavsdk,sfadfrt,dsflskdjf,网站域名
1,skdlsldjfl,skdfjavsdk,sfadfrt,dsflskdjf,yazu.com;
2,skdlsldjfl,skdfjavsdk,sfadfrt,dsflskdjf,benyz.com;benkz.com;
3,skdlsldjfl,skdfjavsdk,sfadfrt,dsflskdjf,tahucy.cn;taochy.com;
4,skdlsldjfl,skdfjavsdk,sfadfrt,dsflskdjf,zgtzs.com;
5,skdlsldjfl,skdfjavsdk,sfadfrt,dsflskdjf,csjt.com;
6,skdlsldjfl,skdfjavsdk,sfadfrt,dsflskdjf,hoa.cc;
7,skdlsldjfl,skdfjavsdk,sfadfrt,dsflskdjf,cslzc.com;
8,skdlsldjfl,skdfjavsdk,sfadfrt,dsflskdjf,dykm.com;sxdw.com;
9,skdlsldjfl,skdfjavsdk,sfadfrt,dsflskdjf,bmyxiao.com;
10,skdlsldjfl,skdfjavsdk,sfadfrt,dsflskdjf,xpjoyu.com;
,skdlsldjfl,skdfjavsdk,sfadfrt,dsflskdjf,
11,skdlsldjfl,skdfjavsdk,sfadfrt,dsflskdjf,bwp.com;
12,skdlsldjfl,skdfjavsdk,sfadfrt,dsflskdjf,cscai.com;
,skdlsldjfl,skdfjavsdk,sfadfrt,dsflskdjf,
13,skdlsldjfl,skdfjavsdk,sfadfrt,dsflskdjf,jodu.com;
14,skdlsldjfl,skdfjavsdk,sfadfrt,dsflskdjf,csd168.com;
15,skdlsldjfl,skdfjavsdk,sfadfrt,dsflskdjf,hnpx.com;
16,skdlsldjfl,skdfjavsdk,sfadfrt,dsflskdjf,stkj.com;
17,skdlsldjfl,skdfjavsdk,sfadfrt,dsflskdjf,hnpjx.com;
18,skdlsldjfl,skdfjavsdk,sfadfrt,dsflskdjf,zhanjy.com;