Python基础知识（28）：常用第三方模块

一、Pillow

PIL（Python Imaging Library）：提供了强大的图像操作功能，可以通过简单的代码完成复杂的图像处理，是Python平台事实上的图像处理库，支持Python 2.7以及更低的版本

Pillow：在PIL基础上创建的兼容版本，同时加入了更多新特性，支持Python 3.x

1、安装Pillow

如果安装了Anaconda，Pillow就已经可用了。否则，需要在命令行下通过pip安装

2、操作图像

（1）图像缩放

from PIL import Image

#在当前路径下，打开一个jpg图像文件

im = Image.open('test.jpg')

#获得图像尺寸

w, h = im.size

print('Original image size: %sx%s' % (w, h))

#缩放50%

im.thumbnail((w//2, h//2))

print('Resize image to: %sx%s' % (w//2, h//2))

#把缩放后的图像用jpeg格式保存

im.save('thumbnail.jpg', 'jpeg')

结果：

Original image size: 1000x1000

Resize image to: 500x500

（2）模糊效果

from PIL import Image, ImageFilter

# 打开一个jpg图像文件，注意是当前路径:
im = Image.open('test.jpg')
# 应用模糊滤镜:
im2 = im.filter(ImageFilter.GaussianBlur)
im2.save('blur.jpg', 'jpeg')

效果如下：

（3）生成字母验证码

from PIL import Image, ImageDraw, ImageFont, ImageFilter

import os

import random

#随机字母

def rndChar():

    return chr(random.randint(65, 90))

#随机颜色1：

def rndColor():

    return (random.randint(64, 255), random.randint(64, 255), random.randint(64, 255))

#随机颜色2：

def rndColor2():

    return (random.randint(32, 127), random.randint(32, 127), random.randint(32, 127))

#240 x 60：

width = 60 * 4

height = 60

image = Image.new('RGB', (width, height), (255,255,255))

#创建Font对象

#font = ImageFont.truetype('Arial.ttf', 36)

font = ImageFont.truetype('arial.ttf', 36)

#创建Draw对象：

draw = ImageDraw.Draw(image)

#填充每个像素：

for x in range(width):

    for y in range(height):

        draw.point((x, y), fill=rndColor())

#输出文字：

for t in range(4):

    draw.text((60 * t + 10, 10), rndChar(), font=font, fill=rndColor2())

#模糊：

image = image.filter(ImageFilter.BLUR)

image.save('code.jpg', 'jpeg')

验证码：

二、requests

用于访问网络资源，处理URL资源时比urllib模块更方便

1、安装requests

如果安装了Anaconda，requests就已经可用了。否则，需要在命令行下通过pip安装

2、使用requests

（1）通过GET访问一个页面

>>> import requests

>>> r = requests.get('https://www.douban.com/') # 豆瓣首页

>>> r.status_code

200

>>> r.text

r.text

'<!DOCTYPE HTML>\n<html>\n<head>\n<meta name="description" content="提供图书、电影、音乐唱片的推荐、评论和...'

（2）发送POST请求

发送POST请求，只需要把get()方法变成post()，然后传入data参数作为POST请求的数据

r = requests.post('https://accounts.douban.com/login', data={'form_email': 'abc@example.com', 'form_password': ''})

三、chardet

检测编码，处理不规范的第三方网页时，在不知道编码的情况下可以用chardet，获取编码后在转为str，方便后续处理

（1）安装chardet

如果安装了Anaconda，chardet就已经可用了。否则，需要在命令行下通过pip安装

（2）使用chardet

用chardet检测编码

import chardet

s = chardet.detect(b'Hello,world!')

print(s)

结果：

{'encoding': 'ascii', 'confidence': 1.0, 'language': ''}
检测出的编码是ascii，注意到还有个confidence字段，表示检测的概率是1.0（即100%）

检测GBK编码的中文

import chardet

data = '人生苦短，我学Python'.encode('gbk')

s = chardet.detect(data)

print(s)

结果：

{'encoding': 'GB2312', 'confidence': 0.99, 'language': 'Chinese'}

对日文进行检测

import chardet

#新的一天开始了,要好好加油哦

data = '新しい一日が始まったから、頑張ってね'.encode('euc-jp')

s = chardet.detect(data)

print(s)

结果：

{'encoding': 'EUC-JP', 'confidence': 1.0, 'language': 'Japanese'}

ardet支持检测中文、日文、韩文等多种语言

四、psutil

在Python中获取系统信息，可以跨平台使用，支持Linux／UNIX／OSX／Windows等，是系统管理员和运维人员不可或缺的必备模块

（1）安装psutil

如果安装了Anaconda，psutil就已经可用了。否则，需要在命令行下通过pip安装

（2）获取CPU信息

获取CPU信息

import psutil

a = psutil.cpu_count()#CPU逻辑数量

b = psutil.cpu_count(logical=False)#CPU物理核心

print(a)

print(b)

结果：

4

4

统计CPU的用户／系统／空闲时间

import psutil

a = psutil.cpu_times()

print(a)

结果：

scputimes(user=41360.28125, system=27004.4375, idle=268042.21875, interrupt=656.4062576293945, dpc=835.3125014305115)

再实现类似top命令的CPU使用率，每秒刷新一次，累计10次

import psutil

for x in range(10):

    a = psutil.cpu_percent(interval=1, percpu=True)

    print(a)

结果：

[40.6, 28.1, 31.2, 24.6]

[46.9, 32.8, 42.2, 43.8]

[31.8, 31.2, 28.1, 28.1]

[58.2, 56.9, 57.8, 56.2]

[38.2, 40.6, 43.8, 34.9]

[44.6, 51.6, 46.9, 40.9]

[34.3, 32.3, 34.4, 25.0]

[34.3, 32.3, 32.8, 17.2]

[39.4, 42.2, 32.8, 34.4]

[57.6, 67.2, 64.1, 54.7

（3）获取内存信息

使用psutil获取物理内存和交换内存信息

import psutil

a = psutil.virtual_memory()

b = psutil.swap_memory()

print(a)

print(b)

结果：

svmem(total=3679428608, available=730165248, percent=80.2, used=2949263360, free=730165248)

sswap(total=6778257408, used=5174353920, free=1603903488, percent=76.3, sin=0, sout=0)

（4）获取磁盘信息

通过psutil获取磁盘分区、磁盘使用率和磁盘IO信息

import psutil

#磁盘分区信息

a = psutil.disk_partitions()

#磁盘使用情况

b = psutil.disk_usage('/')

#磁盘IO

c = psutil.disk_io_counters()

print(a)

print(b)

print(c)

结果：

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

sdiskusage(total=378581020672, used=107236286464, free=271344734208, percent=28.3)

sdiskio(read_count=1813882, write_count=639951, read_bytes=59520503808, write_bytes=27710433792, read_time=58003, write_time=10482)

（5）获取网络信息

psutil可以获取网络接口和网络连接信息

import psutil

#获取网络读写字节/包的个数

a = psutil.net_io_counters()

#获取网络接口信息

b = psutil.net_if_addrs()

#获取网络接口状态

c = psutil.net_if_stats()

print(a)

print(b)

print(c)

结果：

snetio(bytes_sent=118923812, bytes_recv=1100353188, packets_sent=513738, packets_recv=122094, errin=0, errout=0, dropin=0, dropout=0)

{'WLAN': [snic(family=<AddressFamily.AF_LINK: -1>, address='74-DF-BF-5E-C3-29', netmask=None, broadcast=None, ptp=None), snic(family=<AddressFamily.AF_INET: 2>, address='169.254.55.6', netmask='255.255.0.0', broadcast=None, ptp=None), snic(family=<AddressFamily.AF_INET6: 23>, address='fe80::b122:21:c891:3706', netmask=None, broadcast=None, ptp=None)], '本地连接* 3': [snic(family=<AddressFamily.AF_LINK: -1>, address='76-DF-BF-5E-C3-29', netmask=None, broadcast=None, ptp=None), snic(family=<AddressFamily.AF_INET: 2>, address='169.254.253.30', netmask='255.255.0.0', broadcast=None, ptp=None), snic(family=<AddressFamily.AF_INET6: 23>, address='fe80::d064:e706:8cee:fd1e', netmask=None, broadcast=None, ptp=None)], '本地连接* 4': [snic(family=<AddressFamily.AF_LINK: -1>, address='86-DF-BF-5E-C3-29', netmask=None, broadcast=None, ptp=None), snic(family=<AddressFamily.AF_INET: 2>, address='169.254.231.149', netmask='255.255.0.0', broadcast=None, ptp=None), snic(family=<AddressFamily.AF_INET6: 23>, address='fe80::6d45:5ace:6385:e795', netmask=None, broadcast=None, ptp=None)], '以太网': [snic(family=<AddressFamily.AF_LINK: -1>, address='54-EE-75-A4-F6-66', netmask=None, broadcast=None, ptp=None), snic(family=<AddressFamily.AF_INET: 2>, address='192.168.96.168', netmask='255.255.255.0', broadcast=None, ptp=None), snic(family=<AddressFamily.AF_INET6: 23>, address='fe80::94c9:c414:29e2:897', netmask=None, broadcast=None, ptp=None)], 'VMware Network Adapter VMnet1': [snic(family=<AddressFamily.AF_LINK: -1>, address='00-50-56-C0-00-01', netmask=None, broadcast=None, ptp=None), snic(family=<AddressFamily.AF_INET: 2>, address='192.168.15.1', netmask='255.255.255.0', broadcast=None, ptp=None), snic(family=<AddressFamily.AF_INET6: 23>, address='fe80::d07c:26c3:1b0:674d', netmask=None, broadcast=None, ptp=None)], 'VMware Network Adapter VMnet2': [snic(family=<AddressFamily.AF_LINK: -1>, address='00-50-56-C0-00-02', netmask=None, broadcast=None, ptp=None), snic(family=<AddressFamily.AF_INET: 2>, address='192.168.2.1', netmask='255.255.255.0', broadcast=None, ptp=None), snic(family=<AddressFamily.AF_INET6: 23>, address='fe80::55fc:e8e8:e0f4:54ed', netmask=None, broadcast=None, ptp=None)], 'Loopback Pseudo-Interface 1': [snic(family=<AddressFamily.AF_INET: 2>, address='127.0.0.1', netmask='255.0.0.0', broadcast=None, ptp=None), snic(family=<AddressFamily.AF_INET6: 23>, address='::1', netmask=None, broadcast=None, ptp=None)]}

{'以太网': snicstats(isup=True, duplex=<NicDuplex.NIC_DUPLEX_FULL: 2>, speed=100, mtu=1500), 'VMware Network Adapter VMnet1': snicstats(isup=True, duplex=<NicDuplex.NIC_DUPLEX_FULL: 2>, speed=100, mtu=1500), 'VMware Network Adapter VMnet2': snicstats(isup=True, duplex=<NicDuplex.NIC_DUPLEX_FULL: 2>, speed=100, mtu=1500), 'Loopback Pseudo-Interface 1': snicstats(isup=True, duplex=<NicDuplex.NIC_DUPLEX_FULL: 2>, speed=1073, mtu=1500), 'WLAN': snicstats(isup=False, duplex=<NicDuplex.NIC_DUPLEX_FULL: 2>, speed=0, mtu=1500), '本地连接* 3': snicstats(isup=False, duplex=<NicDuplex.NIC_DUPLEX_FULL: 2>, speed=0, mtu=1500), '本地连接* 4': snicstats(isup=False, duplex=<NicDuplex.NIC_DUPLEX_FULL: 2>, speed=0, mtu=1500)}

获取当前网络连接信息

import psutil

a = psutil.net_connections()

print(a)

结果：

[sconn(fd=-1, family=<AddressFamily.AF_INET6: 23>, type=2, laddr=addr(ip='::', port=500), raddr=(), status='NONE', pid=1740), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='0.0.0.0', port=443), raddr=(), status='LISTEN', pid=4668), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='127.0.0.1', port=59978), raddr=addr(ip='127.0.0.1', port=59977), status='ESTABLISHED', pid=11376), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='127.0.0.1', port=59980), raddr=addr(ip='127.0.0.1', port=59979), status='ESTABLISHED', pid=11376), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='192.168.15.1', port=2177), raddr=(), status='NONE', pid=7540), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='0.0.0.0', port=49676), raddr=(), status='LISTEN', pid=868), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='0.0.0.0', port=64843), raddr=(), status='NONE', pid=3184), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='192.168.15.1', port=138), raddr=(), status='NONE', pid=4), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='192.168.96.168', port=62610), raddr=addr(ip='23.217.125.240', port=80), status='TIME_WAIT', pid=0), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='0.0.0.0', port=6682), raddr=(), status='NONE', pid=2836), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='0.0.0.0', port=64831), raddr=(), status='NONE', pid=6916), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='0.0.0.0', port=60003), raddr=(), status='LISTEN', pid=11376), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='127.0.0.1', port=59979), raddr=addr(ip='127.0.0.1', port=59980), status='ESTABLISHED', pid=11376), sconn(fd=-1, family=<AddressFamily.AF_INET6: 23>, type=2, laddr=addr(ip='fe80::94c9:c414:29e2:897', port=2177), raddr=(), status='NONE', pid=7540), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='0.0.0.0', port=445), raddr=(), status='LISTEN', pid=4), sconn(fd=-1, family=<AddressFamily.AF_INET6: 23>, type=2, laddr=addr(ip='fe80::55fc:e8e8:e0f4:54ed', port=2177), raddr=(), status='NONE', pid=7540), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='127.0.0.1', port=6942), raddr=(), status='LISTEN', pid=11376), sconn(fd=-1, family=<AddressFamily.AF_INET6: 23>, type=1, laddr=addr(ip='::', port=49665), raddr=(), status='LISTEN', pid=1260), sconn(fd=-1, family=<AddressFamily.AF_INET6: 23>, type=2, laddr=addr(ip='::', port=5355), raddr=(), status='NONE', pid=1924), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='0.0.0.0', port=135), raddr=(), status='LISTEN', pid=1080), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='0.0.0.0', port=56480), raddr=(), status='NONE', pid=2836), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='192.168.96.168', port=138), raddr=(), status='NONE', pid=4), sconn(fd=-1, family=<AddressFamily.AF_INET6: 23>, type=1, laddr=addr(ip='::1', port=8307), raddr=(), status='LISTEN', pid=4668), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='192.168.15.1', port=139), raddr=(), status='LISTEN', pid=4), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='0.0.0.0', port=80), raddr=(), status='LISTEN', pid=4), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='0.0.0.0', port=6666), raddr=(), status='NONE', pid=2836), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='192.168.96.168', port=2177), raddr=(), status='NONE', pid=7540), sconn(fd=-1, family=<AddressFamily.AF_INET6: 23>, type=1, laddr=addr(ip='::', port=49676), raddr=(), status='LISTEN', pid=868), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='127.0.0.1', port=59977), raddr=addr(ip='127.0.0.1', port=59978), status='ESTABLISHED', pid=11376), sconn(fd=-1, family=<AddressFamily.AF_INET6: 23>, type=1, laddr=addr(ip='::', port=443), raddr=(), status='LISTEN', pid=4668), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='192.168.96.168', port=62634), raddr=addr(ip='223.202.62.231', port=443), status='SYN_SENT', pid=4740), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='0.0.0.0', port=49665), raddr=(), status='LISTEN', pid=1260), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='192.168.96.168', port=56309), raddr=addr(ip='113.96.232.146', port=8080), status='ESTABLISHED', pid=11164), sconn(fd=-1, family=<AddressFamily.AF_INET6: 23>, type=2, laddr=addr(ip='::', port=4500), raddr=(), status='NONE', pid=1740), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='127.0.0.1', port=60281), raddr=addr(ip='127.0.0.1', port=60280), status='ESTABLISHED', pid=4668), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='127.0.0.1', port=63342), raddr=(), status='LISTEN', pid=11376), sconn(fd=-1, family=<AddressFamily.AF_INET6: 23>, type=2, laddr=addr(ip='fe80::d07c:26c3:1b0:674d', port=2177), raddr=(), status='NONE', pid=7540), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='0.0.0.0', port=28653), raddr=(), status='LISTEN', pid=11164), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='0.0.0.0', port=49664), raddr=(), status='LISTEN', pid=736), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='0.0.0.0', port=912), raddr=(), status='LISTEN', pid=3204), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='0.0.0.0', port=59214), raddr=(), status='NONE', pid=11164), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='0.0.0.0', port=59005), raddr=(), status='NONE', pid=2784), sconn(fd=-1, family=<AddressFamily.AF_INET6: 23>, type=1, laddr=addr(ip='::', port=445), raddr=(), status='LISTEN', pid=4), sconn(fd=-1, family=<AddressFamily.AF_INET6: 23>, type=1, laddr=addr(ip='::', port=135), raddr=(), status='LISTEN', pid=1080), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='0.0.0.0', port=5050), raddr=(), status='NONE', pid=1652), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='127.0.0.1', port=8307), raddr=(), status='LISTEN', pid=4668), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='127.0.0.1', port=21440), raddr=(), status='LISTEN', pid=12916), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='192.168.96.168', port=137), raddr=(), status='NONE', pid=4), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='0.0.0.0', port=49667), raddr=(), status='LISTEN', pid=2384), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='192.168.96.168', port=62616), raddr=addr(ip='120.55.34.37', port=443), status='TIME_WAIT', pid=0), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='192.168.96.168', port=139), raddr=(), status='LISTEN', pid=4), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='192.168.96.168', port=56248), raddr=addr(ip='1.192.193.180', port=80), status='ESTABLISHED', pid=6916), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='192.168.96.168', port=62632), raddr=addr(ip='59.37.97.23', port=443), status='ESTABLISHED', pid=11164), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='192.168.96.168', port=55965), raddr=addr(ip='113.96.208.198', port=8080), status='ESTABLISHED', pid=11352), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='192.168.2.1', port=137), raddr=(), status='NONE', pid=4), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='0.0.0.0', port=5355), raddr=(), status='NONE', pid=1924), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='0.0.0.0', port=49668), raddr=(), status='LISTEN', pid=896), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='0.0.0.0', port=5040), raddr=(), status='LISTEN', pid=1652), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='192.168.15.1', port=137), raddr=(), status='NONE', pid=4), sconn(fd=-1, family=<AddressFamily.AF_INET6: 23>, type=1, laddr=addr(ip='::', port=80), raddr=(), status='LISTEN', pid=4), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='127.0.0.1', port=60280), raddr=addr(ip='127.0.0.1', port=60281), status='ESTABLISHED', pid=4668), sconn(fd=-1, family=<AddressFamily.AF_INET6: 23>, type=1, laddr=addr(ip='::', port=49667), raddr=(), status='LISTEN', pid=2384), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='127.0.0.1', port=59018), raddr=(), status='NONE', pid=1740), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='0.0.0.0', port=4500), raddr=(), status='NONE', pid=1740), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='0.0.0.0', port=64766), raddr=(), status='NONE', pid=2784), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='0.0.0.0', port=3600), raddr=(), status='NONE', pid=6916), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='192.168.2.1', port=139), raddr=(), status='LISTEN', pid=4), sconn(fd=-1, family=<AddressFamily.AF_INET6: 23>, type=2, laddr=addr(ip='::', port=5353), raddr=(), status='NONE', pid=1924), sconn(fd=-1, family=<AddressFamily.AF_INET6: 23>, type=1, laddr=addr(ip='::', port=49668), raddr=(), status='LISTEN', pid=896), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='0.0.0.0', port=500), raddr=(), status='NONE', pid=1740), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='192.168.2.1', port=2177), raddr=(), status='NONE', pid=7540), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='192.168.96.168', port=56353), raddr=addr(ip='180.163.238.166', port=80), status='ESTABLISHED', pid=6916), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='0.0.0.0', port=53088), raddr=(), status='NONE', pid=2836), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='192.168.96.168', port=56004), raddr=addr(ip='52.230.80.159', port=443), status='ESTABLISHED', pid=1740), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='192.168.2.1', port=138), raddr=(), status='NONE', pid=4), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='192.168.96.168', port=56051), raddr=addr(ip='104.78.72.7', port=443), status='CLOSE_WAIT', pid=2800), sconn(fd=-1, family=<AddressFamily.AF_INET6: 23>, type=1, laddr=addr(ip='::', port=49664), raddr=(), status='LISTEN', pid=736), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='127.0.0.1', port=21441), raddr=(), status='LISTEN', pid=12916), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='0.0.0.0', port=5353), raddr=(), status='NONE', pid=1924), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='192.168.96.168', port=62623), raddr=addr(ip='120.55.34.37', port=443), status='TIME_WAIT', pid=0), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=2, laddr=addr(ip='127.0.0.1', port=59213), raddr=(), status='NONE', pid=11164), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='0.0.0.0', port=902), raddr=(), status='LISTEN', pid=3204), sconn(fd=-1, family=<AddressFamily.AF_INET6: 23>, type=1, laddr=addr(ip='::', port=49666), raddr=(), status='LISTEN', pid=1740), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='0.0.0.0', port=49666), raddr=(), status='LISTEN', pid=1740), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='127.0.0.1', port=31752), raddr=(), status='LISTEN', pid=4740), sconn(fd=-1, family=<AddressFamily.AF_INET: 2>, type=1, laddr=addr(ip='192.168.96.168', port=62630), raddr=addr(ip='14.17.42.43', port=36688), status='TIME_WAIT', pid=0)]

（6）获取进程信息

通过psutil可以获取到所有进程的详细信息

>>> 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

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