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.. _precision_expert:
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N-Bit Precision (Expert)
**Audience:** Researchers looking to integrate their new precision techniques into Lightning.
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Precision Plugins
You can also customize and pass your own Precision Plugin by subclassing the :class:`~lightning.pytorch.plugins.precision.precision_plugin.PrecisionPlugin` class.
- Perform pre and post backward/optimizer step operations such as scaling gradients.
- Provide context managers for forward, training_step, etc.
.. code-block:: python
class CustomPrecisionPlugin(PrecisionPlugin):
precision = "16-mixed"
...
trainer = Trainer(plugins=[CustomPrecisionPlugin()])
