python - 在python中拆分一个变量表

Question

在调用 lsof 之后，我正在寻找拆分每一行以获取表中每个单元格的字符串的通用方法，问题就来了，因为每次调用该命令时，每一列的大小都可能发生变化。

COMMAND     PID       USER   FD      TYPE             DEVICE  SIZE/OFF       NODE NAME
init          1       root  cwd       DIR                8,1      4096          2 /
kthreadd      2       root  txt   unknown                                         /proc/2/exe
kjournald    42       root  txt   unknown                                         /proc/42/exe
udevd        77       root  cwd       DIR                8,1      4096          2 /
udevd        77       root  txt       REG                8,1    133176     139359 /sbin/udevd
flush-8:1 26221       root  cwd       DIR                8,1      4096          2 /
flush-8:1 26221       root  rtd       DIR                8,1      4096          2 /
flush-8:1 26221       root  txt   unknown                                         /proc/26221/exe
sudo      26228       root    5u     unix 0xfff999002579d3c0       0t0     515611 socket
python    30077       root    2u      CHR                1,3       0t0        700 /dev/null

Answer 1

不是解析 lsof 命令输出，而是安装 psutil 模块——它还具有跨平台的优势。

import psutil

def get_all_files():
    files = set()
    for proc in psutil.process_iter():
        try:
            files.update(proc.get_open_files())
        except Exception: # probably don't have permission to get the files
            pass
    return files

print get_all_files()
# set([openfile(path='/opt/google/chrome/locales/en-GB.pak', fd=28), openfile(path='/home/jon/.config/google-chrome/Default/Session Storage/000789.log', fd=95), openfile(path='/proc/2414/mounts', fd=8) ... ]

然后您可以调整它以包括父进程和其他信息，例如:

导入 psutil

for proc in psutil.process_iter():
    try:
        fids = proc.get_open_files()
    except Exception:
        continue
    for fid in fids:
        #print dir(proc)
        print proc.name, proc.pid, proc.username, fid.path

#gnome-settings-daemon 2147 jon /proc/2147/mounts
#pulseaudio 2155 jon /home/jon/.config/pulse/2f6a9045c2bc8db6bf32b2d7517969bf-device-volumes.tdb
#pulseaudio 2155 jon /home/jon/.config/pulse/2f6a9045c2bc8db6bf32b2d7517969bf-stream-volumes.tdb