# pydoc > _warnings

---
type: CommandReference
command: _warnings
mode: pydoc
section: 
source: pydoc3
---

## Quick Reference
- `_warnings.warn()` — Issue a warning, or maybe ignore it or raise an exception.
- `_warnings.warn_explicit()` — Low-level interface to warnings functionality.

## Name
_warnings provides basic warning filtering support. It is a helper module to speed up interpreter start-up.

## Functions
- `warn` — Issue a warning, or maybe ignore it or raise an exception.
- `warn_explicit` — Low-level interface to warnings functionality.

## Data
python
filters = [('default', None, <class 'DeprecationWarning'>, '__main__',...]
## See Also
- [warnings](https://docs.python.org/3/library/warnings.html) — Public warning control module.