Python扩展库psutil用法精要

0、安装与导入psutil

pip install psutil

import psutil

1、查看CPU信息

>>> psutil.cpu_count() #查看CPU核数

2

>>> psutil.cpu_count(logical=False) #查看CPU物理个数

2

>>> psutil.cpu_percent() #查看CPU使用率

23.4

>>> psutil.cpu_percent(percpu=True) #查看每个CPU的使用率

[18.9, 26.0]

>>> psutil.cpu_times() #查看CPU时间分配情况

scputimes(user=2750.625, system=2876.796875, idle=19316.078125)

2、查看开机时间

>>> import datetime

>>> datetime.datetime.fromtimestamp(psutil.boot_time()) #查看开机时间

datetime.datetime(2015, 7, 28, 7, 17, 50, 125000)

>>> datetime.datetime.fromtimestamp(psutil.boot_time()).strftime('%Y-%m-%d %H:%M:%S')

'2015-07-28 07:17:49'

3、查看内存信息

>>> virtual_memory = psutil.virtual_memory()

>>> virtual_memory.total /1024/1024/1024

2L

>>> virtual_memory.used

1909178368L

>>> virtual_memory.used/1024/1024/1024

1L

>>> virtual_memory.free/1024/1024/1024

1L

>>> virtual_memory.percent

60.0

>>> psutil.swap_memory()

sswap(total=4093583360L, used=2750255104L, free=1343328256L, percent=67.2, sin=0, sout=0)

>>> map(lambda x :x/1024/1024/1024,_)

[3L, 2L, 1L, 6.258487701416016e-08, 0, 0]

4、查看磁盘信息

>>> psutil.disk_partitions() #查看所有分区信息

[sdiskpart(device='C:\\', mountpoint='C:\\', fstype='NTFS', opts='rw,fixed'), sdiskpart(device='D:\\', mountpoint='D:\\', fstype='CDFS',

opts='ro,cdrom'), sdiskpart(device='E:\\', mountpoint='E:\\', fstype='', opts='cdrom'), sdiskpart(device='F:\\', mountpoint='F:\\',

fstype='NTFS', opts='rw,fixed'), sdiskpart(device='G:\\', mountpoint='G:\\', fstype='', opts='cdrom'), sdiskpart(device='H:\\',

mountpoint='H:\\', fstype='NTFS', opts='rw,fixed'), sdiskpart(device='I:\\', mountpoint='I:\\', fstype='NTFS', opts='rw,fixed')]

>>> psutil.disk_usage('c:\\') #查看指定分区的磁盘空间情况

sdiskusage(total=39925473280L, used=33699393536L, free=6226079744L, percent=84.4)

>>> psutil.disk_io_counters(perdisk=True) #查看硬盘读写操作情况

{'PhysicalDrive0': sdiskio(read_count=111439, write_count=257966, read_bytes=3963010048L, write_bytes=3945559040L, read_time=101026455L,

write_time=48928114L)}

5、查看网络流量与收发包信息

>>> psutil.net_io_counters()

snetio(bytes_sent=29524224, bytes_recv=81521587, packets_sent=117718, packets_recv=162906, errin=0, errout=0, dropin=0, dropout=0)

6、查看当前登录用户信息

>>> psutil.users()

[suser(name=u'Administrator', terminal=None, host='0.242.33.0', started=1438039269.0)]

7、查看进程信息

>>> psutil.pids() 查看当前所有进程id

[0, 4, 612, 664, 696, 740, 752, 1008, 1028, 1108, 1232, 1356, 1392, 1428, 1544, 1692, 1756, 1776, 1872, 1928, 412, 668, 2140, 2152, 2164,

2172, 2192, 2200, 2208, 2224, 2304, 2332, 2352, 2376, 2400, 2448, 2516, 2556, 2588, 2652, 2696, 2756, 2808, 2864, 3080, 3136, 3184, 3192,

3244, 3264, 3332, 3720, 3796, 3824, 3872, 3908, 3976, 4024, 2688, 2684, 964, 4152, 4568, 4660, 4980, 5412, 5644, 5804, 4396, 4880, 5072,

6032, 4576, 7036, 5020, 5192, 7548, 1352, 1264, 5816, 8596, 5508, 9124, 8420, 9512, 9416, 2904, 5444, 10696, 11308, 10608, 11564, 10912,

4204, 12056, 8640, 9248, 11180, 10348]

>>> p = psutil.Process(4204) #获取指定id的进程

>>> p.name() #进程名

u'QQBrowser.exe'

>>> p.username() #查看创建该进程的用户名

u'HP6531\\Administrator'

>>> p.cmdline() #查看该进程对应的exe文件

['C:\\Program Files\\Tencent\\QQBrowser\\QQBrowser.exe', '-host=tab', '-scope=8420', '-Cred=624', '-group=0', '-tid=10', '-core=1',

'/prefetch:2']

>>> p.cwd()

'C:\\Program Files\\Tencent\\QQBrowser'

>>> p.exe()

u'C:\\Program Files\\Tencent\\QQBrowser\\QQBrowser.exe'

>>> p.cpu_affinity() #该进程CPU占用情况（运行在哪个CPU上）

[0, 1]

>>> p.num_threads() #该进程包含的线程数量

14

>>> p.threads() #该进程所有线程对象

[pthread(id=11400, user_time=0.1875, system_time=0.1875), pthread(id=12164, user_time=0.0, system_time=0.0), pthread(id=10636,

user_time=0.0, system_time=0.0), pthread(id=8964, user_time=0.0, system_time=0.015625), pthread(id=10872, user_time=0.015625,

system_time=0.046875), pthread(id=12228, user_time=0.0, system_time=0.0), pthread(id=11528, user_time=0.0, system_time=0.0), pthread

(id=5900, user_time=0.0, system_time=0.0), pthread(id=10472, user_time=0.0, system_time=0.0), pthread(id=11100, user_time=0.0,

system_time=0.0), pthread(id=4116, user_time=0.0, system_time=0.015625), pthread(id=8544, user_time=0.0, system_time=0.015625), pthread

(id=8768, user_time=0.0, system_time=0.0), pthread(id=10616, user_time=0.640625, system_time=0.328125)]

>>> p.status() #进程状态

'running'

>>> p.is_running()

True

>>> p.suspend() #挂起

>>> p.status()

'stopped'

>>> p.is_running()

True

>>> p.resume() #恢复运行

>>> p.status()

'running'

>>> p.kill() #结束进程

8、作为一个小例子，下面的代码检查记事本程序是否在运行，如果是，则返回记事本程序对应的进程id

>>> for id in psutil.pids():

 try:

     p = psutil.Process(id)

     if os.path.basename(p.exe()) == 'notepad.exe':

      print id

 except:

  pass

 

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