code: def lr_fun_steps(cur_epoch):
      """Steps schedule (cfg.OPTIM.LR_POLICY = 'steps')."""
      ind = [
          i for i, s in enumerate(cfg.OPTIM.STEPS) if cur_epoch >= s
      ][-1]
      return cfg.OPTIM.LR_MULT**ind
  
file_path: pycls/pycls/core/optimizer.py
imports: import matplotlib.pyplot
  import numpy
  import torch
  from pycls.core.config import cfg
label_desc: Use image node_id 2 for calling a global function with example usage: lr_fun_steps(cur_epoch) and returns: unknown