Created by: zhouwei25

PR types

New features

PR changes

APIs

Describe

Reconstruct all API related to lr scheduler, A total of 12 kinds of class _LRScheduler:

1. Unify dygraph to manual update learning rate by .step() function. User should update learning rate manually by step() .

2. Unify static with dygraph. User should update learning rate manually by step() after executor.run() , every executor.run() will feed the python float value of lr_scheduler into global learning_rate variable.

中文文档

https://github.com/PaddlePaddle/FluidDoc/pull/2459

英文文档