python怎么使用wmi？

pip install wmi

import wmi

def get_cpu(self):

    # Initilization

    c = wmi.WMI()

    data_dict = {}

    for cpu in c.Win32_Processor():

        device = cpu.DeviceID.lower()

        # Get cpu_usage

        data_dict[device] = {'volume': float(cpu.LoadPercentage), 'unit': '%'}

    return data_dict

print get_cpu()