battery_cycles.py 文件源码

def fact():
    '''Returns the battery cycle count'''

    result = 'None'

    try:
        proc = subprocess.Popen(
                ['/usr/sbin/ioreg', '-r', '-c', 'AppleSmartBattery', '-a'],
                stdout=subprocess.PIPE,
                stderr=subprocess.PIPE
                )
        stdout, _ = proc.communicate()
        if stdout:
            result = plistlib.readPlistFromString(stdout)[0]['CycleCount']
    except (IOError, OSError):
        pass

    return {factoid: result}