匹配压缩日志文件中的IP地址列表

Question

我需要从一些（74k）压缩日志文件中找到与IP地址列表（464k）匹配的内容。当我手动解压缩它们并搜索它们我的脚本工作，但是，压缩文件时我没有匹配。

from os import listdir
from os.path import isfile, join
import gzip

realList=open('ipList', 'r')
testlist=open('testList', 'r')
offender=open('offenders', 'w')
# DEV Log Dir Uncompressed #
logDir = 'ulogs'

# DEV Log Dir Compressed #
#logDir = 'clogs'

logFile=[ logFiles for logFiles in listdir(logDir) if isfile(join(logDir, logFiles))]
count=0

with testlist as host:
  ips = set(l.strip() for l in host)
  for lfile in logFile:
    print(lfile)
    # Uncompressed # Results: 870,328 Hits
    with open(logDir + '/' + lfile, 'r') as log:
    # Compressed # Results: 0 Hits
    #with gzip.open(logDir + '/' + lfile, 'r') as log:
      for line in log:
        #print(line)
        elements = line.split()
        if ips.intersection(elements):
          #print(elements[3])
          offender.write(elements[3] + '\n');
          count+=1
    print(count)