Python利用WMI实现ping命令

WMI是Windows系统的一大利器，Python的win32api库提供了对WMI的支持，安装win32api即可使用 WMI。
本例通过WMI的WQL实现ping命令。

import wmi
c = wmi.WMI()
wql = "SELECT StatusCode FROM Win32_PingStatus WHERE Address = '127.0.0.1'"

for i in c.query(wql):
    if i.StatusCode:
        print 'offline'
    else:
        print 'online'

c.query(wql)的结构如下，其中StatusCode为0表示能够ping通，大于0表示ping不通

instance of Win32_PingStatus
{
    Address = "127.0.0.1";
    BufferSize = 32;
    NoFragmentation = FALSE;
    RecordRoute = 0;
    ResolveAddressNames = FALSE;
    SourceRoute = "";
    SourceRouteType = 0;
    StatusCode = 0;
    Timeout = 1000;
    TimestampRoute = 0;
    TimeToLive = 128;
    TypeofService = 128;
};