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我正在使用pyudev库来检测 USB 设备，如下所示：Debian GNU/Linux 8.7 (jessie)python2.7

import sys
import pyudev

def main():
    os = canary.helpers.get_platform_system()

    if os.lower() == "linux":
        print("linux")
        context = pyudev.Context

        monitor = pyudev.Monitor.from_netlink(context)
        monitor.filter_by(device_type='usb')

    elif os.lower() == 'darwin': # actually OS X
        print("OS X is currently not supported, if you would like to add support make a pull request. Aborting...")
        sys.exit()
    elif os.lower() == 'windows':
        print("Windows is currently not supported, if you would like to add support make a pull request. Aborting...")
        sys.exit()
    else:
        print("Unknown operating system. Aborting...")
        sys.exit()


if __name__ == "__main__":
    main()

如多个示例所示 - 但是当我运行代码时，我收到以下错误：

/usr/bin/python2.7 /home/marvin/src/usb_canary/usb_canary.py
linux
Traceback (most recent call last):
File "/home/marvin/src/usb_canary/usb_canary.py", line 45, in <module>
main()
File "/home/marvin/src/usb_canary/usb_canary.py", line 30, in main
monitor = pyudev.Monitor.from_netlink(context)
File "/usr/local/lib/python2.7/dist-packages/pyudev/monitor.py", line 121, in from_netlink
monitor = context._libudev.udev_monitor_new_from_netlink(
AttributeError: type object 'Context' has no attribute '_libudev'

最初pyudev通过 pip 安装后，我忘记确保已libudev-dev安装，所以我通过 pip 安装libudev-dev、卸载pyudev并重新安装它，但错误仍然存​​在。

我目前正在运行libudev-dev版本 215

谁能告诉我为什么会发生这个错误以及如何解决它？我查看了他们的 Github 问题，但没有发现任何人遇到相同的问题。我还查看了他们的 Read the Docs wiki，但仍然没有运气。

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1 回答 1

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看来您需要实例化 Context 才能使用它，所以添加括号：

context = pyudev.Context()

然后filter_by需要另一个输入参数。但是，如果您查看文档，您可能会弄清楚。

于 2017-01-29T00:13:17.290 回答