# pydoc > _warnings

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

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

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

## Synopsis
python
import _warnings
_warnings.warn(message, category, stacklevel)
_warnings.warn_explicit(message, category, filename, lineno, module, registry, module_globals)
## Functions
- `warn()` — Issue a warning, or maybe ignore it or raise an exception.
- `warn_explicit()` — Low-level interface to warnings functionality.

## Data
- `filters = [('default', None, <class 'DeprecationWarning'>, '__main__', ...]` — The default warning filter list.