通过py处理linux中top命令获取到的mem数据

一、top获取到的数据

保存在session.log中，主要字段如下

...
[root@*** ~]$ top
top - 10:16:21 up 1 day, 16:56,  1 user,  load average: 0.32, 0.09, 0.07
...
KiB Mem :  1014904 total,    69072 free,   525736 used,   420096 buff/cache  
...

top - 10:16:24 up 1 day, 16:56,  1 user,  load average: 0.30, 0.09, 0.07
...
KiB Mem :  1014904 total,    70480 free,   524256 used,   420168 buff/cache
...

二、py程序

处理后保存在serverMem.csv中
数据行数大概有36100行，while循环暂时这样写，后续优化

#!/usr/bin/env python
import re

srcfile = "session.log"
descfile = "serverMem.csv"

def GetLine():
    srcfd = open(srcfile, mode='r')
    descfd = open(descfile, mode='w+')
    i = 0
    while (i < 36100): 
        line = srcfd.readline()
        searchTime = re.search( r'(.*)top - (.*?) .*', line, re.M|re.I)
        searchMem = re.search(r'(.*)KiB Mem :(.*?) .*', line, re.M|re.I)
        if searchTime:
            time = searchTime.group(2)
            descfd.writelines(time + ',')
        elif searchMem:
            pattern = re.compile(r'\d+')
            result1 = pattern.findall(line)
            descfd.writelines(result1[0]+','+result1[1]+','+result1[2]+','+result1[3])
            descfd.writelines("\n")
        i += 1

    descfd.close()
    srcfd.close()


GetLine()

对正则表达式不熟，只能这样了，有谁比较熟悉的可以给出指导意见

三、输出结果

serverMem.csv部分结果如下

10:16:21,1014904,69072,525736,420096
10:16:24,1014904,70480,524256,420168
10:16:27,1014904,71476,523140,420288
10:16:30,1014904,66964,527408,420532
10:16:33,1014904,68308,526000,420596
10:16:36,1014904,66532,527832,420540
10:16:39,1014904,67636,526704,420564
...

需要加个头，代码不过关，写文件头没有成功，后续优化

server Mem (KiB): ,,,,
time, total,   free,   used,   buff/cache
10:16:21,1014904,69072,525736,420096
10:16:24,1014904,70480,524256,420168
10:16:27,1014904,71476,523140,420288
10:16:30,1014904,66964,527408,420532
10:16:33,1014904,68308,526000,420596
10:16:36,1014904,66532,527832,420540
10:16:39,1014904,67636,526704,420564
...