How to send a file with ' in the filename?

[cornebam]

Hello everyone!
I am trying to get the bot to send a file into a chat. This worked well so far.

But i want to use a filename which contains '.
The string looks fine in python before i pass it, but in the filename of the file, which the bot sends into the chat, the ' is replaced by a space or removed. I tried all types of escaping which came to my mind but nothing worked.

filename = "test" + "'" + "test" + "''" + ".test"
bot.send_document(chat_id, document=file_object, filename=filename)

results into a file with the name
test test.test

What can i do?

[Poolitzer]

just a blind shot, did you try escaping with \'?

[cornebam]

Yes. In the filename the \' will be replaced by a space.

[Poolitzer]

I tested with the local bot API server to circumvent urrlib, it worked there. So I am afraid this is somewhere there in how urrlib translates fields (https://github.com/python-telegram-bot/urllib3/blob/1954df03958b164483282330b3a58092c070bc7a/urllib3/request.py#L72). Im not awake enough today to further hunt this issue down, but I am sure it happens in this function or in one of the ones it calls.