pip3 install psutil

In []: import psutil

In []: psutil.cpu_times()#使用cpu_times获取cpu的完整信息

Out[]: scputimes(user=769.84, nice=2.78, system=387.68, idle=83791.98, iowait=479.84, irq=0.0, softirq=0.81, steal=0.0, guest=0.0, guest_nice=0.0)

In []: psutil.cpu_count()#获取cpu的逻辑个数

Out[]:

In []: psutil.cpu_times_percent()#获取cpu的所有逻辑信息

Out[]: scputimes(user=0.7, nice=0.0, system=0.5, idle=98.4, iowait=0.4, irq=0.0, softirq=0.0, steal=0.0, guest=0.0, guest_nice=0.0)

In []: psutil.virtual_memory()#获取内存的所有信息

Out[]: svmem(total=, available=, percent=33.0, used=, free=, active=, inactive=, buffers=, cached=, shared=)

In []: psutil.virtual_memory().total

Out[]:

In []: psutil.virtual_memory().used

Out[]:

In []: psutil.virtual_memory().free

Out[]:

In []: psutil.swap_memory()#交换分区相关

Out[]: sswap(total=, used=, free=, percent=, sin=, sout=)

In []: psutil.disk_partitions()#获取磁盘的详细信息

Out[]: [sdiskpart(device='/dev/vda1', mountpoint='/', fstype='ext3', opts='rw,noatime,data=ordered')]

In []: psutil.disk_usage('/')#获取分区的使用情况

Out[]: sdiskusage(total=, used=, free=, percent=11.2)

In []: psutil.disk_io_counters()#获取磁盘总的io个数，读写信息

Out[]: sdiskio(read_count=, write_count=, read_bytes=, write_bytes=, read_time=, write_time=, read_merged_count=, write_merged_count=, busy_time=)

补充说明下：

read_count(读IO数)

write_count(写IO数)

read_bytes(读IO字节数)

write_bytes(写IO字节数)

read_time(磁盘读时间)

write_time(磁盘写时间)

In []: psutil.net_io_counters()#获取网络总信息

Out[]: snetio(bytes_sent=, bytes_recv=, packets_sent=, packets_recv=, errin=, errout=, dropin=, dropout=)

In []: psutil.net_io_counters(pernic=True)#获取每个网络接口的信息

Out[]:

{'eth0': snetio(bytes_sent=, bytes_recv=, packets_sent=, packets_recv=, errin=, errout=, dropin=, dropout=),

'lo': snetio(bytes_sent=, bytes_recv=, packets_sent=, packets_recv=, errin=, errout=, dropin=, dropout=)}

In []: psutil.users()#返回当前登录系统的用户信息

Out[]: [suser(name='root', terminal='pts/0', host='X.X.X.X', started=1492844672.0)]

In []: psutil.boot_time()#获取开机时间

Out[]: 1492762895.0

In []: import datetime#转换成你能看懂的时间

In []: datetime.datetime.fromtimestamp(psutil.boot_time()).strftime("%Y-%m-%d %H:%M:%S")

Out[]: '2017-04-21 16:21:35'

[root@VM_46_121_centos ~]# ps -ef | grep ipython#这里首先我用ps获取ipython进程号

root           : pts/    :: grep --color=auto ipython

root         : pts/    :: /usr/local/bin/python3. /usr/local/bin/ipython

In []: psutil.Process()

Out[]: <psutil.Process(pid=, name='ipython') at >

In []: p=psutil.Process()#实例化一个进程对象，参数为ipython这个进程的PID

In []: p.name()#获得进程名

Out[]: 'ipython'

In []: p.exe()#获得进程的bin路径

Out[]: '/usr/local/bin/python3.5'

In []: p.cwd()获得进程工作目录的绝对路径

Out[]: '/usr/local/lib/python3.5/site-packages/psutil-5.2.2-py3.5.egg-info'

In []: p.status()#获得进程状态

Out[]: 'running'

In []: p.create_time()#获得进程创建的时间,时间戳格式

Out[]: 1492848093.13

In []: datetime.datetime.fromtimestamp(p.create_time()).strftime("%Y-%m-%d %H:%M:%S")

Out[]: '2017-04-22 16:01:33'

In []: p.uids()#获取进程的uid信息

Out[]: puids(real=, effective=, saved=)

In []: p.gids()#获取进程的gid信息

Out[]: pgids(real=, effective=, saved=)

In []: p.cpu_times()#获取进程的cpu的时间信息

Out[]: pcputimes(user=9.53, system=0.34, children_user=0.0, children_system=0.0)

In []: p.cpu_affinity()#获取进程的cpu亲和度

Out[]: []

In []: p.memory_percent()#获取进程的内存利用率

Out[]: 6.187014703452833

In []: p.memory_info()#获取进程的内存rss,vms信息

Out[]: pmem(rss=, vms=, shared=, text=, lib=, data=, dirty=)

In []: p.io_counters()#获取进程的io信息

Out[]: pio(read_count=, write_count=, read_bytes=, write_bytes=, read_chars=, write_chars=)

In []: p.num_threads()获取进程开启的线程数

Out[]: 

popen类的使用:获取用户启动的应用程序的进程信息

In []: from subprocess import PIPE

In []: p1=psutil.Popen(["/usr/bin/python","-c","print('hello')"], stdout=PIPE)

In []: p1.name()

Out[]: 'python'

In []: p1.username()

Out[]: 'root'

In []: p1.communicate()

Out[]: (b'hello\n', None)

In []: p.cpu_times()

Out[]: pcputimes(user=13.11, system=0.52, children_user=0.01, children_system=0.0)