PyTorch Optimizer Lr Scheduler.
Need Python 3.6+.
pip install torch-lr-scheduler
import torch_lr_scheduler
lr_scheduler = torch_lr_scheduler.factory(config={
'line_chain': [{
# warm up to 0.8
'mode': 'linear',
'ratio': 0.01,
'start': 0.2,
'target': 0.8
}, {
# cosine to 0.0
'mode': 'cosine',
'ratio': 1.0,
'target': 0.0
}]
})
print(lr_scheduler)
#> LrScheduler (learning_rate_scale: 1.0) with LineChain (
#> 1.0%, linear from 0.2 to 0.8,
#> 100.0%, cosine from 0.8 to 0.0,
#> )