`used-before-assignment` when import guarded by `TYPE_CHECKING` guarded again when used

[jacobtylerwalls]

Bug description

This emits used-before-assignment...

https://github.com/cuthbertLab/music21/blob/cddb10409b934779c8b28999730fce0621fc2f7f/music21/stream/core.py#L551-L552

when this same name was imported like this...

https://github.com/cuthbertLab/music21/blob/cddb10409b934779c8b28999730fce0621fc2f7f/music21/stream/core.py#L41-L42

Configuration

No response

Command used

pylint

Pylint output

used-before-assignment

Expected behavior

no error

Pylint version

dev

OS / Environment

No response

Additional dependencies

No response