220706 psutil用法学习（pset方法）

pip install psutil

p = psutil.Process(1689)
# 进程名称
print p.name()

p = psutil.Process(1689)
print p.exe()

/Applications/PyCharm.app/Contents/MacOS/pycharm

p = psutil.Process(1689)
print p.cwd()

/Applications/PyCharm.app/Contents/bin

>>> for x in range(10):
...     print(psutil.cpu_percent(interval=1, percpu=True))
... 
[14.0, 4.0, 4.0, 4.0]
[12.0, 3.0, 4.0, 3.0]
[8.0, 4.0, 3.0, 4.0]
[12.0, 3.0, 3.0, 3.0]
[18.8, 5.1, 5.9, 5.0]
[10.9, 5.0, 4.0, 3.0]
[12.0, 5.0, 4.0, 5.0]
[15.0, 5.0, 4.0, 4.0]
[19.0, 5.0, 5.0, 4.0]
[9.0, 3.0, 2.0, 3.0]

>>> psutil.virtual_memory()
svmem(total=8589934592, available=2866520064, percent=66.6, used=7201386496, free=216178688, active=3342192640, inactive=2650341376, wired=1208852480)
>>> psutil.swap_memory()
sswap(total=1073741824, used=150732800, free=923009024, percent=14.0, sin=10705981440, sout=40353792)

>>> psutil.net_io_counters() # 获取网络读写字节／包的个数
snetio(bytes_sent=3885744870, bytes_recv=10357676702, packets_sent=10613069, packets_recv=10423357, errin=0, errout=0, dropin=0, dropout=0)
>>> psutil.net_if_addrs() # 获取网络接口信息
{
  'lo0': [snic(family=<AddressFamily.AF_INET: 2>, address='127.0.0.1', netmask='255.0.0.0'), ...],
  'en1': [snic(family=<AddressFamily.AF_INET: 2>, address='10.0.1.80', netmask='255.255.255.0'), ...],
  'en0': [...],
  'en2': [...],
  'bridge0': [...]
}
>>> psutil.net_if_stats() # 获取网络接口状态
{
  'lo0': snicstats(isup=True, duplex=<NicDuplex.NIC_DUPLEX_UNKNOWN: 0>, speed=0, mtu=16384),
  'en0': snicstats(isup=True, duplex=<NicDuplex.NIC_DUPLEX_UNKNOWN: 0>, speed=0, mtu=1500),
  'en1': snicstats(...),
  'en2': snicstats(...),
  'bridge0': snicstats(...)
}

>>> psutil.net_connections()
Traceback (most recent call last):
  ...
PermissionError: [Errno 1] Operation not permitted

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  ...
psutil.AccessDenied: psutil.AccessDenied (pid=3847)

>>> psutil.pids() # 所有进程ID
[3865, 3864, 3863, 3856, 3855, 3853, 3776, ..., 45, 44, 1, 0]
>>> p = psutil.Process(3776) # 获取指定进程ID=3776，其实就是当前Python交互环境
>>> p.name() # 进程名称
'python3.6'
>>> p.exe() # 进程exe路径
'/Users/michael/anaconda3/bin/python3.6'
>>> p.cwd() # 进程工作目录
'/Users/michael'
>>> p.cmdline() # 进程启动的命令行
['python3']
>>> p.ppid() # 父进程ID
3765
>>> p.parent() # 父进程
<psutil.Process(pid=3765, name='bash') at 4503144040>
>>> p.children() # 子进程列表
[]
>>> p.status() # 进程状态
'running'
>>> p.username() # 进程用户名
'michael'
>>> p.create_time() # 进程创建时间
1511052731.120333
>>> p.terminal() # 进程终端
'/dev/ttys002'
>>> p.cpu_times() # 进程使用的CPU时间
pcputimes(user=0.081150144, system=0.053269812, children_user=0.0, children_system=0.0)
>>> p.memory_info() # 进程使用的内存
pmem(rss=8310784, vms=2481725440, pfaults=3207, pageins=18)
>>> p.open_files() # 进程打开的文件
[]
>>> p.connections() # 进程相关网络连接
[]
>>> p.num_threads() # 进程的线程数量
1
>>> p.threads() # 所有线程信息
[pthread(id=1, user_time=0.090318, system_time=0.062736)]
>>> p.environ() # 进程环境变量
{'SHELL': '/bin/bash', 'PATH': '/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:...', 'PWD': '/Users/michael', 'LANG': 'zh_CN.UTF-8', ...}
>>> p.terminate() # 结束进程
Terminated: 15 <-- 自己把自己结束了

$ sudo python3
Password: ******
Python 3.6.3 ... on darwin
Type "help", ... for more information.
>>> import psutil
>>> psutil.test()
USER         PID %MEM     VSZ     RSS TTY           START    TIME  COMMAND
root           0 24.0 74270628 2016380 ?             Nov18   40:51  kernel_task
root           1  0.1 2494140    9484 ?             Nov18   01:39  launchd
root          44  0.4 2519872   36404 ?             Nov18   02:02  UserEventAgent
root          45    ? 2474032    1516 ?             Nov18   00:14  syslogd
root          47  0.1 2504768    8912 ?             Nov18   00:03  kextd
root          48  0.1 2505544    4720 ?             Nov18   00:19  fseventsd
_appleeven    52  0.1 2499748    5024 ?             Nov18   00:00  appleeventsd
root          53  0.1 2500592    6132 ?             Nov18   00:02  configd
...