code: def __init__(
      self,
      optimizer,
      init_lr,
      warmup_start_lr=-1,
      warmup_steps=0,
      **kwargs,
  ):
      self.optimizer = optimizer
      self.lr = init_lr
      self.warmup_start_lr = (
          warmup_start_lr if warmup_start_lr >= 0 else init_lr
      )
      self.warmup_steps = warmup_steps
  
file_path: lavis/lavis/common/optims.py
imports: import math
  from lavis.common.registry import registry
label_desc: Use image node_id 1 to create a new ConstantLRScheduler object  with example: obj = ConstantLRScheduler(optimizer, init_lr, warmup_start_lr, warmup_steps)