Use TYPE_CHECKING if necessary #6029
Description
Important
In order to reduce review costs and to encourage more contributors to work on it, please, as a rule, fix one file per PR. After one PR submission, please tackle other issues.
Motivation
Some modules are imported only for type checking, but this may cause circular import, leading to an error.
Although such an error is not a big deal for most cases, it may require annoying changes sometimes as in:
The issue above motivates using TYPE_CHECKING.
Suggestion
First, we can check which files to modify by the following:
$ ruff check . --select TCHAdditional context (optional)
No response