E402 currently allows sys.path and os.environ modifications before imports. I'd like to propose adding warnings.filterwarnings() (and related warning module functions) to this exception list.

Rationale:

• It's a common pattern to filter warnings before importing modules that emit warnings during import
• Like sys.path modifications, warning filters affect import-time behavior
• Currently requires verbose # noqa: E402 comments on every subsequent import

Example:

import warnings

warnings.filterwarnings("ignore", category=DeprecationWarning)

import some_module  # Currently triggers E402

Proposed: Treat warnings.filterwarnings(), warnings.simplefilter(), and warnings.resetwarnings() the same as sys.path modifications.