如何使用 Python 在 Windows 7 上获取网卡的使用百分比答案

【问题标题】：How to get % usage of a network card on Windows 7 using Python如何使用 Python 在 Windows 7 上获取网卡的使用百分比
【发布时间】：2012-09-11 22:57:44
【问题描述】：

如何使用 Python 在 Windows 7 上获取一张或多张网卡的使用百分比？我尝试使用 psutil 库，但它只返回传输的数据。

我想获取网卡列表及其使用情况

Network card 1 - 1%
Network card 2 - 0%
Network card 3 - 5%

【问题讨论】：

通过比较传输的数据量和/或将其与最大容量进行比较来推导出它。

标签： python windows windows-7

【解决方案1】：

您无法获取百分比，但可以获取发送和接收的字节数，安装 psutil，导入 psutil 和 re（正则表达式模块）。请参阅下面的示例代码，了解我是如何做到的。

import psutil # http://code.google.com/p/psutil/
import re # Regular expression

#Percentage function
def percentage(part, whole):
        return 100 * float(part)/float(whole)

if __name__ == '__main__':

    #Retrieve all stats for all Network Cards using psutil
    Stats = psutil.net_io_counters(pernic=True)

    #Just showing printed values for Stats, useful for new coders :)
    for key, val in Stats.items():
        print key, val


    #Filter Starts, convert to string for use with Regular expression
    LanString = str(Stats['Local Area Connection'])
    WirelessString = str(Stats['Wireless Network Connection'])

    #Regular expression pattern that collects values between = character and , character
    pattern = re.compile("\=(.*?)\,") 

    #Find all values matching the pattern
    LanResult = re.findall(pattern, LanString)
    WirelessResult = re.findall(pattern, WirelessString)

    #Select values bytes_sent + bytes_recieved, convert to integers, add together
    LanSumUsage = int(LanResult[0]) + int(LanResult[1])
    WirelessSumUsage = int(WirelessResult[0]) + int(WirelessResult[1])

    #Calculate and print percentages
    TotalUsage = LanSumUsage + WirelessSumUsage
    LanCardPercentage = percentage(LanSumUsage, TotalUsage)
    WirelessCardPercentage = percentage(WirelessSumUsage, TotalUsage)
    print("\nLan Card: %d%%") % LanCardPercentage
    print("Wireless Card: %d%%") % WirelessCardPercentage

对编程新手（一周后）持保留态度的代码。也没有错误处理。

哦，我的输出如下，我的网卡没有被使用。

Wireless Network Connection iostat(bytes_sent=801853517, bytes_recv=2106217519, packets_sent=4655581, packets_recv=6351113, errin=0, errout=0, dropin=0, dropout=0)
isatap.{10384343-0618-4406-B3D9-DA096A39B0DC} iostat(bytes_sent=0, bytes_recv=0, packets_sent=0, packets_recv=0, errin=0, errout=0, dropin=0, dropout=0)
Teredo Tunneling Pseudo-Interface iostat(bytes_sent=3358183, bytes_recv=27088294, packets_sent=40579, packets_recv=33727, errin=0, errout=1474, dropin=0, dropout=0)
Local Area Connection iostat(bytes_sent=0, bytes_recv=0, packets_sent=0, packets_recv=0, errin=0, errout=0, dropin=0, dropout=0)
Loopback Pseudo-Interface 1 iostat(bytes_sent=0, bytes_recv=0, packets_sent=0, packets_recv=0, errin=0, errout=0, dropin=0, dropout=0)
isatap.{109E44C6-1D07-4E41-A7EA-FCFF2284A1DB} iostat(bytes_sent=0, bytes_recv=0, packets_sent=0, packets_recv=0, errin=0, errout=0, dropin=0, dropout=0)

Lan Card: 0%
Wireless Card: 100%

【讨论】：