我使用 python 打开大型日志文件，如
Thu Oct 4 23:14:40 2012 [pid 16901] CONNECT: Client "66.249.74.228"
Thu Oct 4 23:14:40 2012 [pid 16900] [ftp] OK LOGIN: Client "66.249.74.228", anon password "googlebot@google.com"
Thu Oct 4 23:17:42 2012 [pid 16902] [ftp] FAIL DOWNLOAD: Client "66.249.74.228", "/pub/10.5524/100001_101000/100039/Assembly-2011/Pa9a_assembly_config4.scafSeq.gz", 14811136 bytes, 79.99Kbyte/sec
Fri Oct 5 00:04:13 2012 [pid 25809] CONNECT: Client "66.249.74.228"
Fri Oct 5 00:04:14 2012 [pid 25808] [ftp] OK LOGIN: Client "66.249.74.228", anon password "googlebot@google.com"
Fri Oct 5 00:07:16 2012 [pid 25810] [ftp] FAIL DOWNLOAD: Client "66.249.74.228", "/pub/10.5524/100001_101000/100027/Raw_data/PHOlcpDABDWABPE/090715_I80_FC427DJAAXX_L8_PHOlcpDABDWABPE_1.fq.gz", 14811136 bytes, 79.99Kbyte/sec
Fri Oct 5 00:13:19 2012 [pid 27354] CONNECT: Client "1.202.186.53"
Fri Oct 5 00:13:19 2012 [pid 27353] [ftp] OK LOGIN: Client "1.202.186.53", anon password "mozilla@example.com"
我想像 tail 命令一样从文件末尾读取行以获取最近 7 天 记录。
这是我的代码，我该如何更改。
import time
f= open("/opt/CLiMB/Storage1/log/vsftp.log")
def OnlyRecent(line):
if time.strptime(line.split("[")[0].strip(),"%a %b %d %H:%M:%S %Y")> time.gmtime(time.time()-(60*60*24*7)):
return True
return False
filename= time.strftime('%Y%m%d')+'.log'
f1= open(filename,'w')
for line in f:
if OnlyRecent(line):
print line
f1.write(line)
f.close()
f1.close()
最佳答案
使用file.seek()跳转到文件末尾的某个偏移量。例如，要在不读取文件开头的情况下打印文件的最后 1Kb，请执行以下操作:
with open("/opt/CLiMB/Storage1/log/vsftp.log") as f:
f.seek(-1000, os.SEEK_END)
print f.read()
关于python打开大日志文件，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/13679063/