trinity.algorithm.policy_loss_fn.dpo_loss module

DPO loss function.

class trinity.algorithm.policy_loss_fn.dpo_loss.DPOLossFn(backend: str = 'verl', beta: float = 0.1, label_smoothing: float = 0.0)

Bases: PolicyLossFn

__init__(backend: str = 'verl', beta: float = 0.1, label_smoothing: float = 0.0) → None

Initialize the policy loss function.

Parameters:

backend – The training framework/backend to use (e.g., “verl”)

classmethod default_args() → Dict

Get default initialization arguments for this loss function.

Returns:

The default init arguments for the policy loss function.

Return type:

Dict

property select_keys

Returns parameter keys mapped to the specific training framework’s naming convention.