此题目涉及到Python对进程的操作、for循环计数循环次数、排序与打印表格等,题目比较简单,效果图如下:

代码如下:

#!/usr/bin/python
# encoding: utf-8
# -*- coding: utf8 -*-
"""
Created by PyCharm.
File:               LinuxBashShellScriptForOps:performanceOps.py
User:               Guodong
Create Date:        2016/9/21
Create Time:        18:11
 """
import psutil
import prettytable

ps_result = list()

for proc in psutil.process_iter():
    ps_result.append({'name': proc.name(), 'pid': proc.pid, 'cpu_percent': proc.cpu_percent(),
                      'memory_percent': proc.memory_percent()})

table = prettytable.PrettyTable()
table.field_names = ["No.", "Name", "pid", "Memory percent"]
for i, item in enumerate(sorted(ps_result, key=lambda x: x['memory_percent'], reverse=True)):
    table.add_row([i + 1, item['name'], item['pid'], format(item['memory_percent'] / 100, '.2%')])
    if i >= 9:
        break
print table

代码也可以从GitHub上获取, https://github.com/DingGuodong/LinuxBashShellScriptForOps/blob/master/functions/process/performanceOps.py

其中用到了两个主要的第三方模块,psutil(用于获取进程信息)和prettytable(用于打印表格),Windows和Linux系统上均可使用,如果提示“ImportError: No module named xxxx”,则可以执行命令pip install xxxx或者easy_install xxxx。

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