Python文件直接操作文件描述符open的大坑

 17 fr1 = open(file1).readlines()
 18 fr2 = open(file2).readlines() ###如果是fr2 = open(file2) ，那麼for 嵌套循環會報錯
 19 sh_dict = {}
 20 cnt_mil = 0
 21 cnt_ent =0
 22 cnt_tech = 0
 23 ch1 = ''
 24 for line in fr1:
 25     #print 'll'
 26     url = line.split('\t')[0]
 27     p1 = urlparse.urlparse(url)[2]
 28     for line2 in fr2:
 29         #print 'ii'
 30         #print '#'+p1+'#'+urlparse.urlparse(line2.split('\t')[0])[2]+'#'
 31         #print urlparse.urlparse(line2.split('\t')[0])[2]
 32         if p1 == urlparse.urlparse(line2.split('\t')[0])[2]:
 33             ch1 = getchannel(url)
 34             #print ch1
 35         if ch1 in ['jmqmil','mil'] and cnt_mil <34:
 36             print line2.strip()
 37             cnt_mil +=1