使用带有设备名称的pyudev检索USB信息

PyUSB确实是获取详细USB信息的理想地址。但是我使用pyudev监视USB可移动设备的插入。因此，我尝试用一​​个库来完成所有我需要做的事情。这是一个有效但丑陋的代码（如您所见，我可以使用pyudev提取我想要的所有信息，但USB大小/容量除外）：

import glibfrom pyudev import Context, Monitorimport pyudevimport subprocessdef get_block_infos(dev_name):    dev = pyudev.Device.from_device_file(context, dev_name)    try:        objProc = subprocess.Popen('lsblk --nodeps %s | grep -v SIZE  | awk '{ print  }'' % dev.get('DEVNAME'), shell=True, bufsize=0, executable="/bin/bash", stdin=None, stdout=subprocess.PIPE, stderr=subprocess.PIPE)    except OSError, e:        print(e)    #  stdOut.communicate() --> dimension [0]: stdout, dimenstion [1]: stderr    stdOut = objProc.communicate()    print('<BLOCK INFORMATION>')    print('Device name: %s' % dev.get('DEVNAME'))    print('Device type: %s' % dev.get('DEVTYPE'))    print('Bus system: %s' % dev.get('ID_BUS'))    print('Partition label: %s' % dev.get('ID_FS_LABEL'))    print('FS: %s' % dev.get('ID_FS_SYSTEM_ID'))    print('FS type: %s' % dev.get('ID_FS_TYPE'))    print('Device usage: %s' % dev.get('ID_FS_USAGE'))    print('Device model: %s' % dev.get('ID_MODEL'))    print('Partition type: %s' % dev.get('ID_PART_TABLE_TYPE'))    print('USB driver: %s' % dev.get('ID_USB_DRIVER'))    print('Path id: %s' % dev.get('ID_PATH'))    print('Capacity: %s' % stdOut[0].strip())    print('</BLOCK INFORMATION>')def get_usb_infos(dev_path):    print('<USB INFORMATION>')    usb_removable_device = None    # deprecated and removed from dbus    # print(pyudev.Device.from_path(context, id_path))      # because I found no other documented way, I iterate    # over all  devices and match my pci path..    for device in context.list_devices(subsystem='usb'):        usb_dev_path = device.get('DEVPATH')        if dev_path.startswith(usb_dev_path): # this matches the usb hub, # the usb controller and # in third place the usb stick # so lets watch out for the # longest/most precise match        try: if len(usb_dev_path) > len(usb_removable_device.get('DEVPATH')):     usb_removable_device = device        except AttributeError: # ignore because in first loop # usb_removable_device is None and # there is no usb_removable_device.get() attrib usb_removable_device = device        # get more information with usb_removable_device.items()        print('Vendor: %s' % usb_removable_device.get('ID_VENDOR_FROM_DATAbase'))        print('</USB INFORMATION>')try:    from pyudev.glib import MonitorObserver    def device_event(observer, device):        get_block_infos(device.get('DEVNAME'))        get_usb_infos(device.get('DEVPATH'))except:    from pyudev.glib import GUDevMonitorObserver as MonitorObserver    def device_event(observer, action, device):        get_block_infos(device.get('DEVNAME'))        get_usb_infos(device.get('DEVPATH'))context = Context()monitor = Monitor.from_netlink(context)monitor.filter_by(subsystem='block')observer = MonitorObserver(monitor)observer.connect('device-event', device_event)monitor.start()glib.MainLoop().run()

该脚本的示例输出为：

<BLOCK INFORMATION>Device name: /dev/sdbDevice type: diskBus system: usbPartition label: CentOS-6.5-x86_64-LiveCDFS: LINUXFS type: iso9660Device usage: filesystemDevice model: Patriot_MemoryPartition type: dosUSB driver: usb-storagePath id: pci-0000:00:1d.0-usb-0:1.2:1.0-scsi-0:0:0:0Capacity: 14.5G</BLOCK INFORMATION><USB INFORMATION>Vendor: Kingston Technology Company Inc.</USB INFORMATION><BLOCK INFORMATION>Device name: /dev/sdb1Device type: partitionBus system: usbPartition label: CentOS-6.5-x86_64-LiveCDFS: LINUXFS type: ext4Device usage: filesystemDevice model: Patriot_MemoryPartition type: dosUSB driver: usb-storagePath id: pci-0000:00:1d.0-usb-0:1.2:1.0-scsi-0:0:0:0Capacity: 14.4G</BLOCK INFORMATION><USB INFORMATION>Vendor: Kingston Technology Company Inc.</USB INFORMATION>