top -o %MEM -b > file.txt
file.txt 如下：
top - 15:49:36 up 32 min, 2 users, load average: 1.56, 1.40, 1.01
Tasks: 83 total, 2 running, 79 sleeping, 2 stopped, 0 zombie
%Cpu(s): 24.4 us, 8.1 sy, 0.0 ni, 55.0 id, 0.0 wa, 0.0 hi, 12.5 si, 0.0 st
KiB Mem: 195252 total, 191568 used, 3684 free, 3200 buffers
KiB Swap: 901116 total, 44 used, 901072 free. 66940 cached Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
485 root 20 0 68160 61420 4552 R 58.7 31.5 5:06.10 python3
712 www-data 20 0 230940 4436 2044 S 26.1 2.3 3:54.04 apache2
819 root 20 0 8488 4400 3856 S 6.5 2.3 1:06.85 tcpdump
713 www-data 20 0 230780 4344 2044 S 13.0 2.2 2:34.97 apache2
868 root 20 0 6352 3976 2720 S 0.0 2.0 0:00.07 bash
785 root 20 0 6340 3876 2636 S 0.0 2.0 0:00.06 bash
707 root 20 0 6056 3704 2580 S 0.0 1.9 0:00.59 apache2
137 root 20 0 8284 3256 2996 S 0.0 1.7 0:00.34 systemd-journal
1 root 20 0 5476 3112 2072 S 0.0 1.6 0:01.04 systemd
456 ntp 20 0 5820 3012 2576 S 0.0 1.5 0:00.71 ntpd
865 root 20 0 4008 2792 2360 S 0.0 1.4 0:00.04 login
938 nobody 20 0 5244 2756 2404 S 0.0 1.4 0:00.04 vsftpd
941 nobody 20 0 5244 2756 2404 S 0.0 1.4 0:00.03 vsftpd
457 root 20 0 31220 2740 2080 S 0.0 1.4 0:00.01 rsyslogd
484 root 20 0 4008 2692 2268 S 0.0 1.4 0:00.05 login
944 root 20 0 5076 2620 2352 R 0.0 1.3 0:00.00 top
903 root 20 0 5080 2580 2236 T 0.0 1.3 0:00.00 top
908 root 20 0 5052 2560 2288 T 0.0 1.3 0:00.08 top
425 root 20 0 5416 2420 2100 S 0.0 1.2 0:00.00 cron
406 root 20 0 5012 2348 2120 S 0.0 1.2 0:00.00 cron
148 root 20 0 12272 2320 1856 S 0.0 1.2 0:00.09 systemd-udevd
414 message+ 20 0 5244 2268 1960 S 0.0 1.2 0:00.00 dbus-daemon
390 statd 20 0 4576 2264 1764 S 0.0 1.2 0:00.00 rpc.statd
我应该以 XML 格式而不是 txt 文件保存信息！该怎么做？
我想我可以使用 Python 但我不知道如何使用：
#coding:utf-8
from xml.dom.minidom import Document
doc = Document()
root = doc.createElement('InfoMemoria')