picword里找不到文件时要更好的处理一下

[hdcola]

No error handlers are registered, logging exception.
Traceback (most recent call last):
File "/home/ehelper/.local/lib/python3.10/site-packages/telegram/ext/dispatcher.py", line 555, in process_update
handler.handle_update(update, self, check, context)
File "/home/ehelper/.local/lib/python3.10/site-packages/telegram/ext/handler.py", line 198, in handle_update
return self.callback(update, context)
File "/ehelper/cmdproc/wordpic.py", line 38, in map_word_to_pic_command
filename = f"res/picwords/{slice[0]['filename']}"
KeyError: 0