group name character constraints

[cckuailong]

First, Thank you for the excellent toml paser.
I have a problem here
When I parse the toml

[测试]
url = "test"

I got an error:
toml.decoder.TomlDecodeError: Invalid group name '测试'. Try quoting it.

I read the decoder.py, I find the constraints of the group name here

_groupname_re = re.compile(r'^[A-Za-z0-9_-]+$')

I don't know why constraints here. If I modify it to

_groupname_re = re.compile(r'^.*?$')

Everything is ok.

So, is it a bug or the special design.

[eksortso]

As of v0.5 of the TOML standard, which the toml module conforms to: bare keys, like unquoted table names, "may only contain ASCII letters, ASCII digits, underscores, and dashes," so what you're seeing is intentional behavior. It's not special; it's standard.

So, like the error message said, try quoting it. toml does parse this:

["测试"]
url = "test"

There is action being taken in the standard to allow more Unicode characters in bare keys, including Chinese text. But that will take some time.

[cckuailong]

Thank u for reply, I didn't see the standard of toml before. Thank u