March 2022
Intermediate to advanced
522 pages
13h 52m
Chinese
Content preview from Python语言及其应用（第2版）
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242
｜
第
15
章
root:xnu-4903.251.3~3/RELEASE_X86_64',
machine='x86_64')
>>> os.getloadavg()
(1.794921875, 1.93115234375, 2.2587890625)
>>> os.cpu_count()
4
实用函数
system()
可以在终端上执行你所输入的命令字符串。
>>> import os
>>> os.system('date -u')
Tue Apr 30 13:10:09 UTC 2019
0
15.1.5
使用
psutil
获取进程信息
第三方包
psutil
也可以提供
Linux
、
Unix
、
macOS
和
Windows
的系统和进程信息。
你应该能猜到安装方法：
$
pip install psutil
信息范围包括以下内容。
系统
CPU
、内存、磁盘、网络和传感器。
进程
id
、父进程
id
、
CPU
、内存、打开的文件和线程。
你已经看到了（在
os
模块的讨论中），我的计算机配备了
4
个
CPU
。这些
CPU
的运行时
间（以秒为单位）各是多少？
>>> import psutil
>>> psutil.cpu_times(True)
[scputimes(user=62306.49, nice=0.0, system=19872.71, idle=256097.64),
scputimes(user=19928.3, nice=0.0, system=6934.29, idle=311407.28),
scputimes(user=57311.41, ...
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