This repo is outdated and will no longer be maintained.

Unofficial implementation of the lookahead mechanism for optimizers.

pip install git+https://github.com/cyberzhg/keras-lookahead.git

• tensorflow/addons:LookAhead

Arguments:

• optimizer: Original optimizer.
• sync_period: the k in the paper. The synchronization period.
• slow_step: the α in the paper. The step size of slow weights.

from keras_lookahead import Lookahead

optimizer = Lookahead('adam', sync_period=5, slow_step=0.5)

Custom optimizers can also be used:

from keras_radam import RAdam
from keras_lookahead import Lookahead

optimizer = Lookahead(RAdam())