问题
Suddenly today, I can no longer type letters or numbers into the editor in PyCharm 2018.2.2 Build #PY-182.4129.34. I can still type symbols such as [] and {} but letters and numbers appear when typed and then immediately are deleted.
I've checked that Vim emulation is off, the plugin is not even installed as far as I can tell. I've updated my Material Theme plugin. None of my settings have been changed since I last used PyCharm.
It's independent of what file I'm editing. I've also disabled my international keyboard. Read-only is turned off as well.
I'm out of ideas.
回答1:
When all else fails:
file -> invalidate caches/restart
回答2:
Try to deactivate Vim by 'Tools -> Vim Emulator' (Untick the option)
来源：https://stackoverflow.com/questions/52194338/cannot-type-letters-or-numbers-in-pycharm