如何在Docker容器中使用'keyboard'python模塊而不會出現錯誤？

Question

我正在嘗試在docker容器中使用python模塊鍵盤進行模擬鍵盤按鍵的自動化測試。 但是，此模塊在docker容器中不斷返回錯誤，而在ubuntu VM中運行良好。

我安裝了不同的常用Docker容器和不同版本的python。 我犯了同樣的錯誤。 可悲的是，谷歌並沒有像平常一樣有用。

這是我所做操作的易於復制的版本：

docker run -t -d -u root --name docker_container python:3.7
echo $(docker exec -u root docker_container bash -c 'python3 -m keyboard' )

這將返回以下錯誤消息：

/usr/local/lib/python3.7/site-packages/keyboard/_nixkeyboard.py:110: UserWarning: Failed to create a device file using `uinput` module. Sending of events may be limited or unavailable depending on plugged-in devices.
  device = aggregate_devices('kbd')
Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/threading.py", line 926, in _bootstrap_inner
    self.run()
  File "/usr/local/lib/python3.7/threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/local/lib/python3.7/site-packages/keyboard/_nixcommon.py", line 106, in start_reading
    self.event_queue.put(device.read_event())
  File "/usr/local/lib/python3.7/site-packages/keyboard/_nixcommon.py", line 83, in read_event
    data = self.input_file.read(struct.calcsize(event_bin_format))
AttributeError: 'NoneType' object has no attribute 'read'

Exception in thread Thread-2:
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/threading.py", line 926, in _bootstrap_inner
    self.run()
  File "/usr/local/lib/python3.7/threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/local/lib/python3.7/site-packages/keyboard/_nixcommon.py", line 106, in start_reading
    self.event_queue.put(device.read_event())
  File "/usr/local/lib/python3.7/site-packages/keyboard/_nixcommon.py", line 83, in read_event
    data = self.input_file.read(struct.calcsize(event_bin_format))
AttributeError: 'NoneType' object has no attribute 'read'

Traceback (most recent call last):
  File "/usr/local/lib/python3.7/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/usr/local/lib/python3.7/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/usr/local/lib/python3.7/site-packages/keyboard/__main__.py", line 10, in <module>
    keyboard.hook(print_event_json)
  File "/usr/local/lib/python3.7/site-packages/keyboard/__init__.py", line 459, in hook
    append(callback)
  File "/usr/local/lib/python3.7/site-packages/keyboard/_generic.py", line 67, in add_handler
    self.start_if_necessary()
  File "/usr/local/lib/python3.7/site-packages/keyboard/_generic.py", line 35, in start_if_necessary
    self.init()
  File "/usr/local/lib/python3.7/site-packages/keyboard/__init__.py", line 194, in init
    _os_keyboard.init()
  File "/usr/local/lib/python3.7/site-packages/keyboard/_nixkeyboard.py", line 114, in init
    build_tables()
  File "/usr/local/lib/python3.7/site-packages/keyboard/_nixkeyboard.py", line 73, in build_tables
    dump = check_output(['dumpkeys', '--keys-only'], universal_newlines=True)
  File "/usr/local/lib/python3.7/subprocess.py", line 395, in check_output
    **kwargs).stdout
  File "/usr/local/lib/python3.7/subprocess.py", line 472, in run
    with Popen(*popenargs, **kwargs) as process:
  File "/usr/local/lib/python3.7/subprocess.py", line 775, in __init__
    restore_signals, start_new_session)
  File "/usr/local/lib/python3.7/subprocess.py", line 1522, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'dumpkeys': 'dumpkeys'

據我了解，它無法訪問uinput設備/鍵盤以轉儲鍵。 有沒有一種方法可以虛擬模擬容器中的鍵盤以使其工作？

Answer 1

嘗試安裝以下內容：

apt-get install -y kmod kbd

因為你需要這個來獲取dumpkeys